Administrative law deals with rules created and applied by government bodies that have been delegated powers from the executive branch, such as boards, agencies, commissions, and tribunals. These government bodies regulate many activities that have a significant impact on individuals and businesses. Administrative law is a complex area that involves determining the legality of government actions and providing individuals with mechanisms for judicial review and remedies for wrongful government acts. It has expanded greatly in the 20th century as more government agencies were created to regulate increasingly complex social and economic spheres.