This instrument is the Work Health and Safety (Work Health and Safety Consultation, Co-operation and Co-ordination) Code of Practice 2015. It is an approved code of practice made under section 274 of the Work Health and Safety Act 2011. The Code says an approved code of practice is a practical guide to achieving the standards of health, safety and welfare required under the WHS Act and the Work Health and Safety Regulations.
That legal status matters. The Code is not the same thing as the Act or the Regulations, but it is more than general guidance. The foreword states that in most cases, following an approved code of practice would achieve compliance with the relevant health and safety duties for the subject matter covered by the code. It also states that courts may use the Code as evidence of what is known about a hazard, risk or control and may rely on it in determining what is reasonably practicable. Inspectors may also refer to an approved code when issuing an improvement or prohibition notice.
The Code also makes clear that a business can comply by following another method, such as a technical or industry standard, if that method provides an equivalent or higher standard of work health and safety than the code. In practice, that means businesses should not dismiss the Code as optional reading. If you are not following it, you should be confident your alternative approach is at least as protective and can be explained clearly if challenged.