Legal provisions governing the functioning of the UPSC are primarily outlined in the Constitution of India under Articles 315 to 323. These articles establish the UPSC as a constitutional body responsible for recruiting civil services and advising the government on various service matters. The duties, powers, and procedures for appointments are detailed in the UPSC Regulations and various Acts, such as the UPSC Act of 1950. Additionally, the Government of India is empowered to frame rules regarding UPSC's examination processes and administrative operations, ensuring the commission operates effectively and maintains its autonomy.