What is the relevance of the President's assent for laws made by State Legislatures in this context?
In this context, the relevance of the President's assent for laws made by State Legislatures is that it acts as a safeguard against any law that may be deemed void on the grounds of being inconsistent with or taking away or abridging the rights conferred by Article 14 or Article 19 of the Indian Constitution. If such a law has been reserved for the consideration of the President and has received his assent, then the provisions of this article (Article 31C) will not apply to it, allowing the law to stand even if it may otherwise be considered void.