315. With the concurrence of the Legislature concerned the President of the Federation in case of Federal and Indian laws and the Heads of various Units in cases of laws of their Units may by order provide that until repealed or amended by competent authority these laws in force before the commencement of the Constitution shall have effect as from a specified date subject to such adaptations and modifications as appear to him to be necessary or expedient for bringing the provisions of that law into accord with the provisions of this Constitution.
