Determining the mix in NSW public schools

Direction and guidance on the principles and processes for school-created staffing positions. It covers varying the mix of positions under the school’s centrally identified staffing entitlement (centrally identified positions) and creating additional positions using flexible school-based funding (above centrally identified positions).

Audience

All:

  • principals and executives on the options for school-created staffing positions
  • Directors, Educational Leadership, in providing support to principals in local decision-making and accountability processes
  • the department’s Education support staff on school-created staffing positions.
Version Date Description of changes Approved by

V01.0.0

22/01/2026

Under the 2023 Policy and procedure review program, new policy document consolidating existing instructions and improving clarity and readability.

Chief People Officer


About the policy

Under the Workforce planning and management policy, the department is committed to maintaining a capable, well-managed and sustainable workforce, and delivering educational services of the highest quality by ensuring the right people and plans are in place to deliver the best outcomes for our communities.

Term Definition

ACIP

Above centrally identified position: an additional role, using flexible school-based funding.

AEO

Aboriginal education officer

AER

Anticipated Enrolment Return

ASLSO

Aboriginal school learning and support officer

BM

Business manager

CIP

Centrally identified position: provided for under the school's centrally identified staffing entitlement.

the department

NSW Department of Education

eFPT

enterprise Financial Planning Tool

FTE

Full-time equivalent

GSE

Government sector employment

HDA

Higher duties allowance

HSLO

Home school liaison officer

LMBR

Learning Management and Business Reform

NERA

NSW National Education Reform Agreement

NESA

NSW Education Standards Authority

OASIS

Office Automation and School Information System: finance system used by schools that have not yet fully deployed to LMBR.

OMSEE

Online Management of School Enrolment and Entitlement system

PSNSW

Public Schools NSW

RAM

Resource Allocation Model

Relevant recruitment team

School recruitment, Priority Recruitment Support (PRS), Student Wellbeing Support.

SAP

Finance system used by all NSW public schools.

SASS

School administrative and support staff

SBAR

School Budget Allocation Report

SLSO

School learning support officer

SEP

School Excellence Plan

Standard cost approach

Staff on different bands of the same employee classification will cost the same to schools, allowing schools to choose the most suitable staff member on merit (except for casual staff and temporary staff employed using school and community source funds).

Staffing entitlement

The number and type of staff a school is entitled to, as calculated by the department each year.

Staffing Agreement

The Agreement between the NSW Department of Education and the NSW Teachers Federation on Staffing of NSW Public Schools 2024-2029.

SASS Staffing Procedure

The agreement between the NSW Department of Education and the Public Service Associated on SAS Staffing of NSW Public Schools 2020.

Variation to the mix of staff

When a vacancy occurs, either for teaching service staff or school administrative and support staff, the principal can review the school's staffing structure, in the context of the school’s School Excellence Plan, and take the opportunity to temporarily vary the mix of staff. Variations to the mix of staff must be made in accordance with the Principles for Determining the Mix of Staff in Schools procedure.

Principals:

Centrally identified positions (CIPs)

  • ensure the school’s planned staffing composition is aligned to the School Excellence Framework
  • determine the staffing composition of the school within these procedures and the staff planning component of the enterprise Financial Planning Tool (eFPT)
  • ensure variations to the mix of staff meet the requirements of the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)
  • accountable for the financial position of the school, including the operation of the school within the school budget
  • ensure staffing practices comply with legislative requirements, awards, industrial agreements and departmental guidelines.

Varying the mix of staff

  • consult with the school community and the Director, Educational Leadership to ensure the temporary variation aligns with the strategic direction of the school’s Excellence Framework
  • ensure the temporary variation aligns with the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)
  • ensure the SAM vacancy is permanently vacant if creating a permanent business manager 1 or business manager 2 position, noting school funding must be used to fund the difference in cost.

Above centrally identified positions (ACIPs)

  • ensure the functions of ACIPs strategically align to the learning and wellbeing needs of students and the strategic directions of the school’s School Excellence Framework
  • ensure the creation of the ACIP is aligned to the purpose of the flexible funding used
  • consult on the creation of permanent ACIPs with the school community and the Director, Educational Leadership
  • review funding sources annually to assess the affordability and longevity of ACIPs
  • ensure the financial viability of flexible funding will continue for the duration of any temporary engagement and for at least the next 3 years for any school created permanent ACIP
  • ensure the Director, Educational Leadership endorses the Education Case when creating a permanent ACIP
  • manage the ending of permanent ACIPs, as required.

Director, Educational Leadership:

  • support principals to ensure their school operates within their total school budget
  • support principals to ensure school staffing practices comply with legislative requirements, relevant staffing agreements, industrial awards, procedures and departmental guidelines.

CIPs

  • review the proposed staffing composition of schools and ensure they align to the school’s School Excellence Framework and students' learning and wellbeing needs.

Varying the mix of staff

ACIPs

  • ensure the school community has been consulted when determining the decision to create permanent ACIPs
  • ensure the creation of the ACIP is aligned to the purpose of the flexible funding used
  • assist principals in ensuring all budget requirements for the creation of ACIPs can be met by the school
  • endorse the proposed Education Cases from the principals for the creation of permanent ACIPs where all criteria are met.

Relevant recruitment team:

  • action all recruitment requests that are compliant with this procedure, legislation and staffing procedures and support the necessary recruitment activity
  • provide advice to schools on how to best use school-created staffing positions to meet the individual needs of each school
  • ensure all variations to entitlement are compliant with the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)
  • ensure schools have obtained the necessary endorsement for all permanent ACIP recruitment requests
  • ensure schools comply with all legislative requirements, relevant staffing agreements, industrial awards, procedures and departmental guidelines.

Finance directorate:

  • provide schools with their school budget allocations
  • provide advice on the strategic management of school budgets and resources to improve student outcomes
  • track budget performance and oversee the school level financial risk, including additional school costs associated with an ACIP
  • assist schools in managing permanent ACIPs where budget adjustments occur
  • monitor school expenditure and notify Directors, Educational Leadership of schools exceeding, or at high risk of exceeding their base allocation budget
  • oversee the overarching school finance governance framework.

Employee Relations:

  • provide advice to ensure that staffing practices, processes, and procedures are compliant with all legislative requirements, industrial awards and industrial agreements
  • communicate relevant changes to legislation and industrial agreements to principals, Directors, Educational Leadership, School Workforce directorate and relevant Education Support staff
  • facilitate communication and consultation with the relevant representative bodies and unions, as required.

Public Schools division:

Joint Monitoring and Review Committee:

  • monitor changes to the mix of base teaching staff, as per Clause 16 of the Staffing Agreement 2024–2029
  • monitor changes to the mix of base school administrative and support staff, which are subject to consultation provisions between the department and the Public Service Association.

What needs to be done

Principles for school-created staffing positions:

  • Support principals to manage staffing within school budgets that meet the needs of students.
  • Apply all relevant legislation, industrial relations agreements, and appropriate department policies and procedures to determine a school's staffing mix.
  • Schools choose the number and roles of staff within their budgets to best meet local needs, within the department’s class size policy and NSW Education Standards Authority (NESA) requirements.

1. School-created position options

Schools have greater options in the way they engage and use staff, in line with the School Excellence Framework, the Staffing Agreement 2024–2029 and School administrative and support staff recruitment. Understanding the options and conditions of employment within schools is essential for principals to make use of the available budget and staffing options.

The School Budget Allocation Report (SBAR) provides schools with their base allocation, equity loadings and targeted funding. Principals must plan and budget their school’s funding to strategically resource their Strategic Improvement Plan initiatives and have the required impact on student learning outcomes. The enterprise Financial Planning Tool (eFPT) will assist schools with budgeting for staff. School staffing composition must be consistent with the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB).

Schools wishing to engage a permanent business manager BM1 or BM2 using vacant school administrative manager (SAM) entitlement must refer to School administrative and support staff recruitment.

Schools wishing to engage a paraprofessional should refer to the Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only).

The management of staff in ACIPs must be in accordance with the same industrial awards and agreements as applied to all other department employees in that employment type.

1.1. Teaching staff

The following must be followed when engaging teaching staff:

The available staffing options for engaging teaching staff under this procedure:

Table 1 Staffing options for engaging teachers

Option Reference

Temporary engagement as a part of a variation to the mix of staff resulting from a vacancy (CIP)

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

Temporary employment (staff only)

Staffing procedure – sections:

2.2 Centrally identified positions

2.3 Above centrally identified positions

2.4 Longer term temporary appointments

Temporary engagement using flexible funding or school and community source funds (ACIP)

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

Temporary employment (staff only)

Staffing procedure – sections:

2.2 Centrally identified positions

2.3 Above centrally identified positions

2.4 Longer term temporary appointments

Permanent creation of an ACIP using flexible funding or school and community source funds

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

Temporary employment (staff only)

Staffing procedure – sections:

2.2 Centrally identified positions

2.3 Above centrally identified positions

2.4 Longer term temporary appointments

Casual for less than 4 weeks at 1.0 FTE or less than 2 terms at less than 1.0 FTE

Casual employment (staff only)

Note: Higher Duties Allowance (HDA) is not an ACIP or a variation to the mix of staff. This document does not reference or alter the HDA process.

1.2. School administrative and support staff (SASS) and government sector employment (GSE) staff

Comply with the following when engaging SASS or GSE staff:

The available staffing options for hiring SASS and GSE staff under this procedure:

Table 2 Staffing options for hiring SASS and GSE staff

Option Reference

Temporary engagement as a part of a variation to the mix of staff resulting from a vacancy (CIP)

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

School administrative and support staff recruitment

Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only)

Government Sector Employment Act 2013 (NSW)

Temporary engagement using flexible funding or school and community source funds (ACIP)

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

School administrative and support staff recruitment

Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only)

Government Sector Employment Act 2013 (NSW)

Permanent creation of BM1 or BM2 positions as part of a variation to the mix of staff using vacant SAM entitlement (CIP). Note: vacant SAM entitlement will not cover the full salary of a BM position. Schools must use flexible funding to cover the difference between the SAM and BM salary. The difference will vary depending on the SAM level and the BM level being considered.

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

School administrative and support staff recruitment

Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only)

Government Sector Employment Act 2013 (NSW)

Permanent creation of an ACIP using flexible funding or schools and community source funds

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

School administrative and support staff recruitment

Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only)

Government Sector Employment Act 2013 (NSW)

Casual (irregular or intermittent or short-term urgent engagement)

Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)

School administrative and support staff recruitment

Employment of Paraprofessionals in NSW Government Schools Guidelines (staff only)

Government Sector Employment Act 2013 (NSW)

Note: Higher Duties Allowance (HDA) is not an ACIP or a variation to the mix of staff. This document does not reference or alter the HDA process.

Funding sources and guidelines

Principals can refer to the Decision flow chart to determine position type (staff only) (PDF 352 KB).

When determining a school’s staffing composition, principals must consider how each position is funded. The Standard cost (staff only) approach outlines how positions are costed.

1.3. ACIP-related costs incurred by schools

This table shows the expenses schools must cover when creating a permanent ACIP.

Table 3 Cost type and allocation

Cost type Cost allocation Comment

Salary-related expenses

School funded

Salary costs are outlined on Public Schools Salaries Support (staff only).

On-costs

School funded

Includes superannuation and leave loading.

Approved allowances

Centrally funded

*nd

Leave-related expenses

School funded

Paid parental leave, jury leave and military leave are centrally funded.

A component of Health and Safety related leave costs is covered by insurance.

Current departmental benefits and incentives (for example, rental subsidies)

Centrally funded

Program area funding used to pay for benefits and incentives. For example, Rural and Remote incentives.

Transferred Officers Compensation

Centrally funded

*nd

Cost of ending a permanent ACIP or ceasing a temporary engagement

School funded

For permanent teaching and SASS positions, an ACIP occupant will be appointed to the nearest suitable vacancy, following the requirements in the relevant staffing procedure. The school will fund all costs until the occupant is placed in a suitable position. Note: when a SASS ACIP position is disestablished or ceases, a permanent employee will have nominated status for a period determined in the Managing Excess Employee Policy. If no suitable vacancies are identified, the employee will be managed under the Managing Excess Employee Policy.

When appointing an ACIP to a permanent GSE position, schools must consider the impact of a potential redundancy payment.

*nd = no data

1.4. ACIPs with multiple funding sources

Permanent ACIPs will be charged to the school at standard cost both for the portion from the allocated school budget and the portion from school and community source funds, in line with the current staffing cost arrangements for schools.

Principals can fund ACIPs from multiple sources. They must list the sources, along with the proportions, in either the Education Case (for permanent positions) or SAP (for temporary engagements). For permanent ACIPs, the relevant recruitment team will create multiple positions to reflect the funding split, to facilitate financial transactions. This does not impact the employee, but the principal will see each fractional position separately in OMSEE. The principal may then appoint one employee against each position creating a 1.0 FTE or relevant FTE engagement.

1.5. Equity-funded positions

Equity-funded positions included in equity loadings as identified in the School Budget Allocation Report (SBAR) must be used to improve outcomes for the identified student cohorts. Equity loadings flexible funds must also be used to improve outcomes for the identified student equity cohorts.

1.6. Insufficient funding for a full position

Where there is insufficient funding for a full-time equivalent position, principals should consider whether a reduced FTE position may be appropriate.

For further advice, principals can email:

2. Centrally identified positions

Centrally identified positions (CIPs) are staffing allocations provided to schools in each school’s annual staffing entitlement. The entitlement is based on actual student enrolments, calculated in accordance with the department’s teacher and SASS Staffing entitlement, and allocations to support school need, such as Quality Teaching, Successful Students.

Refer to the Online Management of School Enrolment and Entitlement (OMSEE) system for more information.

2.1. Varying the mix of staff

Variations to the mix of staff must be justifiable and endorsed by the director, educational leadership and reviewed each year. As part of the school planning and review, the school should follow the process for varying the mix of staff.

A variation to the mix of staff must be temporary (except for BM) and does not require an education case. However, the variation must be within budget and consistent with the school’s Excellence Framework to have the required impact on student learning outcomes.

Variations to the mix of staff within entitlement (see Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB)) cannot be permanent ACIPs.

Variation to the permanent vacant SAM entitlement to fund a BM position must be justifiable, within budget, and consistent both with the school plan and the intended purpose of the funding. Variations to the vacant SAM entitlement can be used to create a permanent CIP BM1 or BM2 position.

When a vacancy occurs in a school, the principal may have the opportunity to vary the mix of staff to best meet the learning needs of students, as per the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB).

The principles state:

  • When vacancies occur, either for teaching service staff or school administrative and support staff, the principal can review the school's staffing structure, in the context of the school’s Strategic Improvement Plan, and determine the mix of staff. Note: A variation to the mix of staff can only be temporary for the current year, except for a SASS BM1 or BM2. The principal can use permanent vacant SAM entitlement to create a permanent BM1 or BM2 position.
  • Funding allocated to a school's budget includes equity loadings, which provide additional needs-based funding to support improved outcomes for the identified student cohorts.

Principals can consider flexible funding when establishing additional teaching and executive positions, as well as school administrative and support staff (SASS) to meet educational needs as identified in the school’s Excellence Framework. Equity loadings flexible funds must be used to improve outcomes for the identified student equity cohorts.

Once a vacancy occurs at the school, varying the mix of school staff requires the following steps:

  1. Identify a vacant position or component of entitlement at the school.
  2. Discuss the proposed variation with the school community and Director, Educational Leadership to best meet school and student needs as identified in the school’s Excellence Framework.
  3. Review the Principles for Determining the Mix of Staff in Schools (staff only) (PDF 106 KB) to ensure all conditions and requirements are met.
  4. Ensure the variation fits within the budget. The enterprise Financial Planning Tool (eFPT) will help with this.
  5. Submit a Staffing Details Notification form through OMSEE to place the vacant position on hold for the current year. Note in the comments that the position is being used to vary the mix of staff and has been endorsed by the Director, Educational Leadership.
  6. Review conditions of employment and apply recruitment processes for the proposed temporary or permanent BM positions.
  7. Complete and submit a temporary engagement form through SAP MSS (as necessary). This is not required for the creation of permanent BM positions.
  8. Record the variation to the mix of staff and the temporary engagement in the eFPT.

3. Above centrally identified positions

Above centrally identified positions (ACIPs) are positions in a school that are not part of school entitlement. A school can create and fund them through flexible funding sources, such as equity loading flexible funds or school and community source funds. Permanent ACIPs must not be funded through the centrally identified staffing allocation by using vacant full-time equivalent (FTE) or through a variation to the mix of staff provided for under that allocation. ACIPs are distinct from higher duty arrangements as ACIPs establish a new position.

3.1. Temporary and permanent engagements

To create an ACIP, schools must meet the following criteria:

  • The role supports students’ learning and wellbeing and will have the required impact on student outcomes as identified in the school’s Strategic Excellence Framework.
  • Flexible funding for all costs associated with the position is reasonably expected to continue for the duration of any temporary engagement.
  • The school can fund the additional costs of creating a permanent ACIP, such as leave costs and professional learning. Plus allow for an increase in the standard rates and costs. Refer to Public Schools Salaries Support (staff only).

In addition, for a permanent ACIP:

  • The school community has been consulted.
  • The Director, Educational Leadership endorses the creation of the permanent ACIP.
  • Where the position/role is permanent, there needs to be an ongoing requirement for the position/role.
  • Flexible funding for all costs associated with the permanent ACIP is reasonably expected to continue for at least the next 3 years.
  • Refer to the Decision flow chart to determine position type (staff only) (PDF 352 KB) to determine position type for more information about how to fund a role and the appointment type required.

Note: creating ACIP positions does not alter a school’s base funding or principal classification.

3.2. How to appoint an ACIP

Different processes must be followed when appointing an ACIP – one for temporary engagements and one for permanent appointments.

To fill the following temporary positions, the principal must:

Teaching ACIP

  • follow any required procedures (for example, an expression of interest/EOI)
  • ensure the teacher is Approved to Teach
  • create and submit a temporary engagement through SAP ESS/MSS, including details of the position's funding source.

SASS ACIP

  • follow any required procedures (for example, EOI)
  • ensure the officer has the required clearances, including Working with Children Check (WWCC)
  • create and submit a temporary engagement through SAP ESS/MSS, to include the funding source for the position/role. Refer to the Create a temporary engagement – QRG (staff only).

Note: if it is anticipated that the position may become permanent in the future, it is recommended that a competitive selection process be undertaken as per the SASS staffing procedure.

GSE ACIP

  • follow any required procedures (for example, EOI)
  • ensure the officer has the required clearances, including WWCC
  • complete an OMSEE form.

A temporary engagement cannot be modified to a permanent ACIP without a new process being completed to request and establish the permanent position/role. Depending on the staffing procedures applicable to the employment classification involved, this may require a new recruitment process to be completed and the direct appointment of the temporary occupant to the new permanent position/role may not be possible.

An Education Case must be endorsed, including consultation and identification of ongoing funding source. Refer to Education case to create a permanent above centrally identified position (ACIP) (staff only) (DOCX 36 KB) and Principal’s checklist for the creation of an ACIP (staff only) (DOCX 27 KB).

To fill the following approved permanent appointments, the principal must:

Teaching ACIP

  • submit a Staffing Details Notification form through OMSEE. The relevant staffing procedures listed at Section 10.5 describe the principles, methods and process to be applied to recruit, promote or transfer employees.

SASS ACIP

  • submit a Staffing Details Notification form through OMSEE. The relevant staffing procedures listed at Section 10.5 describe the principles, methods and process to be applied to recruit, promote or transfer employees.

GSE ACIP

  • complete staffing notification form through OMSEE and attach the completed and approved Education Case
  • follow the relevant procedures to recruit an employee for the role.

4. How to disestablish a permanent or temporary ACIP

A school may be required to end a permanent ACIP in certain situations. Examples include insufficient funding, changes to the educational needs of the students or enrolment or curriculum variations.

Refer to 7.1 of the Staffing Agreement for situations that necessitate ending a permanent teacher ACIP position.

4.1. How to disestablish a permanent ACIP

The school is required to fund all costs associated with the ended ACIP. If an ACIP needs to be disestablished, a CIP position cannot be disestablished in its place. For example, if funding is no longer available to maintain an ACIP, the ACIP may not be retained and a CIP disestablished instead.

To disestablish a permanent teaching ACIP, the principal must:

Teaching ACIP

  • advise School Recruitment at SchoolRecruitment@det.nsw.edu.au of the position’s disestablishment
  • have the employee submit a nominated transfer through the Online Transfer System which requires the principal’s certification of the teacher’s satisfactory performance and nominated transfer status.

SASS ACIP

  • advise School Recruitment at SchoolRecruitment@det.nsw.edu.au of the position’s disestablishment
  • following the ending of a permanent SASS ACIP position an employee should apply to be directly appointed to the nearest suitable vacancy by submitting a nominated transfer through the Online Transfer System
  • understand that the placement period as a nominated transfer will be specified in the Managing Excess Employees Policy (PDF 471 KB). If it is not possible to place the employee into a suitable vacancy during this time, they will be managed under the department’s Managing Excess Employees Policy.

GSE ACIP

  • complete and submit a staffing notification form through OMSEE
  • following the disestablishment of a permanent GSE ACIP position, the employee will be given priority consideration to be appointed to the nearest suitable vacancy. The placement will be for a 3-month period. If it is not possible to place the employee into a suitable vacancy during this time, they will be managed under the department’s Managing Excess Employees Policy (PDF 471 KB).

For further information contact EDConnect on 1300 32 32 32 and select the option for School recruitment (follow the prompts).

For permanent teaching ACIP appointments, the school will fund all costs until the occupant is placed in a suitable position within the establishment.

For permanent SASS ACIP or GSE ACIP appointments, the school must fund all costs until the occupant is either placed into a suitable position/role or is paid a redundancy, this can be for a period of up to six months.

4.2. How to cease a temporary engagement for a temporary ACIP

To cease a temporary engagement for a temporary teaching SASS ACIP, the principal must:

  • amend the end date of the temporary engagement through SAP MSS. Refer to Amend a temporary engagement end date – QRG (staff only)
  • know that in the case of early cessation of a temporary teacher ACIP engagement, the school must provide a minimum of 4 weeks’ notice or a payment in lieu of notice. For temporary SASS ACIP engagements, a minimum of 2 weeks’ notice is required, or payment in lieu of notice.

To cease a temporary GSE ACIP, the principal must:

  • complete and submit staffing notification form through OMSEE
  • know that a minimum of 2 weeks’ notice or payment in lieu of notice is required.

For further information call EDConnect on 1300 32 32 32 and select option,1 (follow the prompts).

Record keeping requirements

Record Classification Disposal action

Records documenting the appointment and subsequent employment history (including separation from the organisation) of successful applicants for a position. Includes:

  • job applications and resumes
  • conduct and services checks
  • letters of appointment and acceptance
  • recognition of prior service
  • confidentiality agreement as part of employment
  • code of conduct
  • service records
  • correspondence, reports etc. relating to separation.

Note: use this entry for records of training where they relate to occupational health and safety training or where they are required by individual employees as part of employment conditions or to perform their duties.

GA28 15.4.3

Retain minimum of 75 years after date of birth or minimum of 7 years after employment ceases, whichever is longer, then destroy.

Supporting tools, resources and related information

Policy contact

For further information, please contact EDConnect Human Resources on 1300 32 32 32 and select the option for School recruitment (follow the prompts).

SchoolRecruitment@det.nsw.edu.au

The Executive Director, School Workforce monitors the implementation of this policy, regularly reviews its contents to ensure relevance and accuracy, and updates it as needed.

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