How can a law be deemed void if it does not give effect to such policy, as mentioned under article 31C?
A law cannot be deemed void if it does not give effect to the policy mentioned under article 31C, as per the given context. The article states that "no law giving effect to the policy of the State towards securing all or any of the principles laid down in Part IV shall be deemed to be void on the ground that it is inconsistent with, or takes away or abridges any of the rights conferred by article 14 or article 19." Furthermore, no law containing a declaration that it is for giving effect to such policy shall be called into question in any court on the ground that it does not give effect to such policy. The only exception is when the law has been made by the Legislature of a State and has received the assent of the President.