Development rules have a hierarchy, starting with legislation and then stepping down to various types of plans, codes, policies and guidelines.

Highest level: Legislation
Acts and regulations, State and regional rules (SEPPs, REPs etc) and Local Environmental Plans (LEPs) are legally binding on those who live, work in, or visit Woollahra, and on the Council.
The Building Code of Australia is referenced in legislation and adopts Standards Australia, both contain technical provisions for the design and construction of buildings and structures.
Numerous acts and regulations are used in the planning and development process, some relevant to Woollahra include:
You can access and search NSW Acts and Regulations at the NSW Government legislation website. Alternatively, you can access all NSW Acts and Regulations and Commonwealth Acts and Regulations through the Australasian Legal Information Institute.
Next level: Non-statutory documents
Development Control Plans (DCPs), codes, policies and guidelines are non-statutory planning documents. These may be prepared and approved by a council or the Director-General of the Department of Planning. DCPs contain detailed planning provisions and must be consistent with their associated environmental planning instruments (SEPPs, REPs and LEPs). DCPs may contain a range of measures such as planning principles, objectives and controls for buildings. DCPs can also have controls for single topics such as landscaping, drainage and car parking. A DCP may apply to a single site, a precinct or an entire local area.