Principal Contractor WHS Duties and Management Plan Obligations

s.309 WHS Regulation 2025

Management Plan Section

$250,000 or more

Value Threshold (s.292)

s.312 WHS Regulation 2025

SWMS Copy Duty

1 July 2026

Section 26A Commencement

1 December 2026

WEL Transition Date

s.291 WHS Regulation 2025

HRCW Definition

Section 309 of the WHS Regulation 2025 requires the principal contractor for a construction project (construction work costing $250,000 or more, section 292) to prepare a written WHS management plan for the workplace before work on the project commences. Under section 309(2) the plan must include the names, positions and health and safety responsibilities of everyone at the workplace whose role carries specific health and safety responsibilities for the project; the arrangements between the businesses at the workplace for consultation, co-operation and co-ordination of activities; the arrangements for managing work health and safety incidents; the site-specific health and safety rules and how everyone at the workplace is told about them; and the arrangements for collecting, assessing, monitoring and reviewing SWMS. Separately, section 315 requires the principal contractor to manage the risks associated with the storage, movement and disposal of construction materials and waste and the storage of plant that is not in use. The management plan is a living document: section 311 requires the principal contractor to review and as necessary revise it so that it remains up to date, and to make workers aware of revisions. Under section 313 a copy must be kept until the project is completed (or, if a notifiable incident occurs in connection with the project, for at least 2 years after the incident), readily accessible to anyone who is to carry out construction work on the project, and available for inspection under the Act. Failing to prepare the plan is an offence under section 309(1).

The principal contractor must collect safe work method statements from every subcontractor performing high-risk construction work before that work commences. Collection alone is insufficient. The principal contractor must review each SWMS to confirm it identifies the hazards specific to the work, prescribes controls that are appropriate to the site conditions, and has been signed by the workers who will perform the work. Where a SWMS is inadequate, the principal contractor must require the subcontractor to revise it before work can proceed. The WHS Regulation 2025 introduces enhanced requirements for SWMS that involve work near energised electrical installations, work in contaminated or flammable atmospheres, and work involving the disturbance of asbestos-containing materials. The principal contractor must maintain a register of all SWMS on site, track version control, and ensure that superseded SWMS are removed from circulation. Under Section 26A, taking effect 1 July 2026, the principal contractor must also verify that each SWMS aligns with the applicable binding codes of practice for the relevant work category.

Collecting a SWMS is not the end of the principal contractor's role. Section 309(2)(e) requires the WHS management plan to set out the arrangements for the collection and the assessment, monitoring and review of SWMS at the workplace, so the plan should describe how the principal contractor checks that the controls described in each SWMS are actually in place. The business carrying out the high risk construction work must put in place arrangements for ensuring the work is carried out in accordance with its SWMS, and must stop the work immediately or as soon as it is safe to do so if it is not, resuming only in accordance with the statement (section 300). Practical monitoring arrangements include scheduled inspections, photographic evidence of control implementation, and documented hold points where work cannot proceed until controls are verified by the principal contractor's representative.

Regulators have identified consistent patterns of failure among principal contractors. The most common include accepting SWMS without reviewing their content, failing to update the WHS management plan when new trades commence work, not maintaining a site-specific emergency plan that reflects the actual number and location of workers, and permitting concurrent work activities that create uncontrolled interface risks such as excavation near overhead crane operations. Principal contractors should implement digital SWMS management platforms that automate collection, version control, and compliance checking. They should also establish daily site walk protocols with documented verification of subcontractor controls, and maintain photographic evidence of compliance at key hold points throughout the construction program.

Matching SWMS templates