The following is an overview of relevant legislation and policies that affect data practices.
NSW legislation resource
Below is a tool to suppport understanding of legislation across the whole NSW Government sector:

Developed by the NSW Data Analytics Centre, the NSW Government Legislation Twin shows visually the interconnections between pieces of legislation to support policy work.
Guidelines and frameworks

The NSW Government Information Classification, Labelling and Handling Guidelines have been developed to help agencies correctly assess the sensitivity or security of their information, so that the information can be labelled, handled, stored and disposed of correctly.

The NSW Government Standard for Quality Reporting establishes common principles and protocols for reporting on data quality, so that agencies can create simple data quality statements and users can easily evaluate whether shared or published data is suitable for re-use.

The NSW Government Open Data Publishing Guidelines have been developed to help NSW Government agency Data Custodians publish open data.

The NSW Infrastructure Data Management Framework is a set of guidelines, procedures and standard approaches to support consistent management of infrastructure data across the NSW Government sector.