Notwithstanding anything contained in this Constitution, no law nor any provision thereof providing for detention, prosecution or punishment of any person, who is a member of any armed or defence or auxiliary forces or any individual, group of individuals or organisation or who is a prisoner of war, for genocide, crimes against humanity or war crimes and other crimes under international law shall be deemed void or unlawful, or ever to have become void or unlawful, on the ground that such law or provision of any such law is inconsistent with, or repugnant to, any of the provisions of this Constitution.