The Australian AAS is a voluntary standard. On their own, the standards have no legal status and there is no requirement to comply with them.
However they can become mandatory if the standard is “…called up in State and Commonwealth legislation.” For example land managers may require use of the standard(s) as part of licencing or access when utilising the environment that they may manage.
Although they are voluntary using them is strongly encourage. Having been developed by the industry and activity experts, they offer guidance based on the best available knowledge and past experience. The standards are not able to foresee every circumstance that might occur. So they aim to allow users to adapt the content to their own particular context, needs and requirements.