Reserved powers, also known as residual powers or residuary powers, are those that are neither banned nor explicitly granted to any government entity by law.
Because it is impracticable to describe every act that the state is permitted to carry out in law, such powers, as well as a general power of competence, are granted.
Final answer:
Hence, the powers those that are neither banned nor explicitly granted to any government entity by law are called ‘Residuary Powers’.