What is the relevance of the year 3-1-1977 in this context?
The relevance of the year 3-1-1977 in this context is that it marks the effective date for the Ins. by the Constitution (Forty-second Amendment) Act, 1976. This amendment made several changes to the Indian Constitution, including adding and modifying various entries in the Seventh Schedule's List I (Union List), which outlines the subjects on which the central government has exclusive powers.