An address is made of of several parts with each part administered by various authorities and legislation.
The street number for an address is issued by the Local Council under the Local Government Act 1993.
A road is named by the Road Authority that maintains the road, for example the Local Council or Roads and Maritime Service. When naming a road the naming authority must follow the processes outlined in the Roads Act 1993 and Roads Regulation 2008.
Address locality (suburb/locality)
Under the Geographical Names Act 1966 the Geographical Names Board (GNB) has a statutory responsibility to determine definitive boundaries for suburbs and localities throughout New South Wales. The GNB works closely with local councils when defining boundaries because local residents are one of the most significant users of the names.
Australia Post are the authority in charge of assigning postcodes to suburbs and localities.
The NSW Address Policy provides information related to each of these components and an additional component, a geocode, required for the address in the NSW Address Database. For further information please refer to Section 4.5 of the NSW Addressing User Manual (PDF 3.5 MB).