There are other commercially available client architect agreements that may be appropriate for use in NSW. Some of these are protected by paywalls.
The Australian Institute of Architects publishes the Client Architect Agreement (CAA2019) for design and building projects of various sizes and complexity. It also publishes the Client Architect Agreement for Limited Services (CAALS2019) for small, less complex projects or partial services. Both documents are free to all Institute members or can be purchased in hardcopy by non-members.
The Association of Consulting Architects publishes the Short Form Client Architect Agreement for the use of ACA members as part of the ACA Business Toolbox.