PINS operates under primary legislation for the appeals system, which is the Town and Country Planning Act (TCPA) 1990 (as amended), the Planning Act 2008 (as amended) which covers the consenting regime for National Infrastructure projects, and the Planning (Wales) Act 2015 which covers Developments of National Significance in Wales. The Local Plans system is covered by the Planning and Compulsory Purchase Act 2004. Frameworks established by related legislation cover other areas of work such as Environmental appeals and Rights of Way casework.