Introduction: The Complex Question of Responsibility

Regulation 58 requires audiometric testing for workers frequently exposed to noise. But what if the worker is a contractor or labour-hire worker, not a direct employee? Who is responsible for ensuring they receive audiometric testing?

This question creates significant confusion in practice. Host employers often assume the contractor’s employer is responsible. Contractors sometimes assume the host employer is responsible. Labour-hire companies operate in regulatory grey zones. Meanwhile, workers may not receive testing, and neither employer can justify non-compliance.

This guide explains the legal framework, practical responsibility allocation, and how to document contractor and labour-hire worker compliance clearly.

The Legal Framework: Who Is the PCBU?

Regulation 58 places the obligation on the “Person Conducting a Business or Undertaking” (PCBU). The first question is: who is the PCBU in a contractor or labour-hire arrangement?

Multiple PCBUs in a Single Workplace

In many arrangements, there are multiple PCBUs, each with separate (and potentially overlapping) duties:

• The host employer (principal contractor or site operator): A PCBU conducting a business at the workplace
• The contractor or labour-hire company: A PCBU conducting its own business (supplying labor or services)
• A principal contractor on a construction site: Often has enhanced duties coordinating WHS across multiple contractors

The fact that there are multiple PCBUs does not diminish each one’s duty. It means there is potential overlap and need for coordination.

The “Primary Duty” of the Host Employer

A key principle: the host employer (the principal) has a primary duty to ensure the safety of all workers at its workplace, including contractors and labour-hire workers. This duty is not delegated away simply because a worker is supplied by another company.

The host employer cannot, in other words, say: “That’s a contractor; they’re responsible for themselves.” The host employer’s primary duty extends to the contractor’s safety.

However, the contractor’s employer also has duties to their workers. So both entities have obligations, and coordination is essential.

Determining Responsibility: Key Factors

Duration and Nature of Engagement

Long-term contractors embedded in the site: If a contractor is on-site for months or years, working full-time in a noise-exposed role, the host employer likely bears primary responsibility for audiometric testing. The contractor is, in practical effect, a quasi-employee.

Short-term specialist contractors: If a contractor is engaged for a specific, short-term project (weeks to a few months), responsibility may be shared or lie primarily with the contractor’s employer. However, the host employer cannot completely avoid responsibility under the primary duty doctrine.

Labour-hire workers: If a worker is supplied by a labour-hire company, the question of who bears responsibility depends on contractual arrangements and who exercises effective control over the worker’s tasks and safety measures.

Who Controls the Work?

Host employer control: If the host employer directs the contractor’s work, determines working conditions, and enforces safety measures, the host employer bears greater responsibility.

Contractor autonomy: If the contractor is engaged to complete a specified outcome and has autonomy in how to achieve it, responsibility may be more clearly with the contractor’s employer.

Prior Testing Status

Contractor with existing baseline: If a contractor has previously undergone baseline audiometric testing with another employer and has current monitoring records, the host employer may rely on that existing documentation (though they should still ensure monitoring is up to date).

Contractor with no prior testing: If a contractor has never had baseline testing, the host employer cannot assume responsibility. One of the parties must conduct it—and quickly, to meet the 3-month baseline window if the contractor is new to noise-exposed work.

The Safe Approach: Shared Responsibility and Clear Documentation

Rather than trying to determine which party bears responsibility, best practice is to assume shared responsibility and clearly document who is doing what.

Pre-Engagement Documentation

Before engaging a contractor or labour-hire worker, clarify in writing:

• Whether the contractor will work in noise-exposed areas (85 dB(A) or above)
• Whether the contractor meets the Regulation 58 criteria (frequently required to use HPE)
• Who is responsible for conducting baseline and monitoring audiometric testing
• What documentation the contractor must provide to prove they have undergone baseline testing
• Timeline expectations for baseline testing
• How the host employer will verify that testing has been conducted and is current

This should be in the contractor’s statement of work, engagement letter, or safety plan—somewhere that creates a clear record.

Requesting Evidence of Prior Testing

Before a contractor begins work in a noise-exposed role, request documentation showing:

• Baseline audiometric test conducted within the last 3 months of commencing this role (or within previous 3 months if they’ve been in noise-exposed work with the same employer)
• Tester’s qualifications and accreditation
• Equipment and facility details showing AS/NZS 1269.4:2014 compliance
• Monitoring test schedule (if the baseline was >2 years ago, next monitoring test is due)

If a contractor cannot produce this documentation, the host employer should clarify: will the contractor’s own employer conduct testing, or will the host employer? Do not allow a contractor to start work without resolving this question.

Labour-Hire Workers: Special Considerations

Labour-hire arrangements create particular complexity because the labour-hire company may not be a traditional contractor with its own operations; it is simply a labor supply intermediary.

Who is the PCBU?

In a labour-hire arrangement, typically:

• The labour-hire company: Is a PCBU (conducting the business of labor supply)
• The host employer: Is a PCBU (controlling the workplace and work activities)
• The labour-hire worker: Is an employee of the labour-hire company but works at the host’s site

Responsibility in Practice

In practice, the host employer often bears primary responsibility for the labour-hire worker’s WHS at the host’s site. However, the labour-hire company cannot delegate its duty to ensure their employees (the labour-hire workers) are safe.

The result: both the labour-hire company and the host employer have duties regarding the labour-hire worker’s audiometric testing. Coordination is essential.

Best Practice Approach for Host Employers

When using labour-hire workers in noise-exposed roles:

• Include in the labour-hire contract that workers must have a baseline audiometric test before commencing noise-exposed work
• Request evidence from the labour-hire company that baseline testing has been conducted
• If the labour-hire company cannot provide this evidence, conduct baseline testing yourself (or require the labour-hire company to do so as a condition of assignment)
• Include monitoring test scheduling in the labour-hire contract terms
• Keep records of the labour-hire worker’s testing status

Subcontractor Chains in Construction: Tracking Responsibility

In construction, subcontractor chains can create deep complexity. A principal contractor engages tier-1 subcontractors. Tier-1 subcontractors engage tier-2 subcontractors. And so on.

The Principle Contractor’s Role

On construction sites, the principal contractor (or principal designer) has a special coordinating role. The principal contractor is responsible for ensuring that all contractors (at all tiers) are complying with WHS law, including audiometric testing requirements for noise-exposed workers.

This does not mean the principal contractor conducts every test. It means the principal contractor coordinates, verifies, and documents that appropriate testing is occurring.

Practical Approach on Construction Sites

• Pre-site induction: Before any contractor (at any tier) commences on-site work, the principal contractor should brief them on WHS requirements, including noise management and audiometric testing obligations.
• Contract requirements: Subcontracting agreements should include explicit requirements for compliance with audiometric testing (if the subcontractor will work in noise-exposed roles).
• Pre-commencement verification: Before a subcontractor’s workers begin work, verify that baseline audiometric testing has been conducted (or will be conducted immediately).
• On-site auditing: The principal contractor may periodically audit subcontractors’ compliance with audiometric testing and other WHS requirements.
• Site-wide record-keeping: The principal contractor may maintain a site-wide register of contractors and their WHS compliance status, including audiometric testing.

Documenting Contractor Compliance: A Practical System

To demonstrate due diligence regarding contractor audiometric testing, maintain clear documentation:

Contractor On-Boarding Checklist

• ☐ Contractor identified as working in noise-exposed role (85 dB(A) or above)
• ☐ Responsibility for audiometric testing clarified in writing (contractor’s employer or host?)
• ☐ Request for evidence of baseline testing made (with deadline)
• ☐ If contractor cannot provide evidence, host conducts or arranges testing (document completion)
• ☐ Baseline test results received and filed
• ☐ Monitoring test schedule identified and communicated

Ongoing Monitoring

• Maintain a contractor register showing: contractor name, role, engagement duration, baseline test date, next monitoring due date
• Periodically verify that monitoring tests are being conducted on schedule
• When a contractor’s engagement ends, confirm that records (baseline and any monitoring) have been retained by the contractor’s employer or archived by the host

Practical Scenarios: Responsibility Allocation

Scenario 1: Long-Term Plant Maintenance Contractor

A manufacturing facility engages a maintenance contractor to provide on-site services. The contractor’s workers are on-site 5 days per week, in the facility’s high-noise areas, for an indefinite period.

Responsibility: The host employer (manufacturer) bears primary responsibility. The contractor should not be permitted to commence work without baseline audiometric testing. The host should verify testing and maintain records. The contractor’s employer should also ensure baseline testing (their duty to their own workers). Both entities have responsibility, but the host’s primary duty is clearly engaged.

Scenario 2: Short-Term Construction Specialist

A general contractor engages a specialist subcontractor to perform high-noise work (concrete cutting, piling) over a 4-week period.

Responsibility: The specialist subcontractor’s employer likely bears primary responsibility for their own workers. However, the general contractor cannot ignore the requirement. The general contractor should request evidence of baseline testing before work begins. If the specialist cannot provide it, the general contractor should either: (a) require the specialist to conduct testing before commencing, or (b) conduct testing themselves and bill it back to the specialist as part of the engagement cost.

Scenario 3: Labour-Hire Placement

A host employer receives labour-hire workers for a 6-month assignment in a food processing facility (high-noise area).

Responsibility: Both the labour-hire company (as employer of the workers) and the host employer (as controller of the workplace) have responsibility. The host employer should include in the labour-hire contract that workers must have baseline audiometric testing. Before workers commence, the host should request evidence from the labour-hire company. If not provided, the host should arrange testing. Monitoring tests should be scheduled within the 2-year cycle from baseline.

Internal Links: Broader WHS and Contractor Context

• WHS audiometric testing requirements across Australia
• Full explanation of Regulation 58 and PCBU obligations
• Retention and management of audiometric testing records

Conclusion

Audiometric testing for contractors and labour-hire workers is not a gray area—it is a clear regulatory obligation, but the question of who bears responsibility requires thoughtful analysis based on the nature of the engagement, duration, and control of the work.

The safe approach: assume shared responsibility and document clearly who is doing what. Before any contractor or labour-hire worker begins work in a noise-exposed role, clarify in writing whether they will be tested by their own employer or by the host, and verify that baseline testing has been or will be conducted. Maintain records. This demonstrates due diligence and ensures workers receive required hearing protection.