The State of Nagaland Act 1962
Section 26. Continuance of existing laws and their adaptation
(1) All laws in force, immediately before the appointed day, in the Naga Hills-Tuensang Area shall continue to be in force in the State of Nagaland until altered, repealed or amended by a competent Legislature or other competent authority.
(2) For the purpose of facilitating the application in relation to the State of Nagaland of any law made before the appointed day, the appropriate Government may, within two years from that day by order make such adaptations and modification of the law, whether by way of repeal or amendment as may be necessary or expedient and thereupon every such law shall have effect subjected to the adaptations and modification so made until altered, repealed or amended by a competent Legislature or other competent authority.
In this section, the expression “appropriate Government means as respect any law relating to a matter enumerated in the Union List in the Seventh Schedule to the Constitution the Central Government and as respects any other law, the Government of Nagaland.