Article 372 of Constitution of India "Continuance in force of existing laws and their adaptation"
(1) Notwithstanding the repeal by this Constitution of the enactments referred to in Article 395 but subject to the other provisions of this Constitution, all the laws in force in the territory of India immediately before the commencement of this Constitution, all the laws in force in the territory of India immediately before the commencement of this Constitution shall continue in force therein until altered or repealed or amended by a competent Legislature or other competent authority.
(2) For the purpose of bringing the provisions of any law in force in the territory of India into accord with the provisions of this Constitution, the President may by order make such adaptations and modifications of such law, whether by way of repeal or amendment, as may be necessary or expedient, and provide that the law shall, as from such date as may be specified in the order, have effect subject to the adaptations and modifications so made, and any such adaptation or modification shall not be questioned in any court of law.
(3) Nothing in clause (2) shall be deemed-
(a) to empower the President to make any adaptation or
modification of any law after the expiration of three years
from the commencement of this Constitution; or
(b) to prevent any competent Legislature or other competent
authority from repealing or amending any law adapted or
modified by the President under the said clause.
Explanation I.- The expression "law in force" in this
Article shall include a law passed or made by a legislature
or other competent authority in the territory of India
before the commencement of this Constitution and not
previously repealed, notwithstanding that it or parts of it
may not be then in operation either at all or in particular
areas.
Explanation II.- Any law passed or made by a legislature or
other competent authority in the territory of India which
immediately before the commencement of this Constitution had
extra-territorial effect as well as effect in the territory
of India shall, subject to any such adaptations and
modifications as aforesaid, continue to have such
extra-territorial effect.
Explanation III.- Nothing in this Article shall be construed
as continuing any temporary law in force beyond the date
fixed for its expiration or the date on which it would have
expired if this Constitution had not come into force.
Explanation IV.- An Ordinance promulgated by the Governor of
a Province under Section 88 of the Government of India Act,
1935, and in force immediately before the commencement of
this Constitution shall, unless withdrawn by the Governor of
the corresponding State earlier, cease to operate at the
expiration of six weeks from the first meeting after such
commencement of the Legislative Assembly of that State
functioning under clause (1) of Article 382, and nothing in
this Article shall be construed as continuing any such
Ordinance in force beyond the said period.
Article 372A of Constitution of India "Power of the
President to adapt laws"
(1) For the purposes of bringing the provisions of any law
in force in India or in any part thereof, immediately before
the commencement of the Constitution (Seventh Amendment)
Act, 1956, into accord with the provisions of this
Constitution as amended by that Act, the President may by
order made before the 1st day of November, 1957 make such
adaptations and modifications of the law, whether by way of
repeal or amendment, as may be necessary or expedient, and
provide that the law shall, as from such date as may be
specified in the order, have effect subject to the
adaptations and modifications so made, and any such
adaptation or modification shall not be questioned in any
court of law.
(2) Nothing in clause (1) shall be deemed to prevent a
competent legislature or other competent authority from
repealing or amending any law adapted or modified by the
President under the said clause.