NSW State Government provides a framework for the development of planning policies at the local government level through a number of agencies and laws.
Here are some useful links to web pages of State government agencies where you can directly reference information on State planning policies and legislation applying to urban and regional areas.
NSW Government Legislation - Includes Acts and statutory instruments (such as regulations and environmental planning instruments) provided by the Parliamentary Counsel's Office. Look up legislation currently in force, archives, FAQs and exposure drafts.
NSW Department of Planning and Environment - State Environmental Planning Policies, metropolitan and regional land use strategies, Basix, planning reform, environmental planning legislation.
NSW Office of Environment and Heritage - OEH care for and protects NSW's environment and heritage, which includes the natural environment, Aboriginal country, culture and heritage, and built heritage.