How was Part XI of the Constitution amended by the Constitution (Forty-second Amendment) Act, 1976?
The context provided does not specifically mention the amendment of Part XI by the Constitution (Forty-second Amendment) Act, 1976. However, it does provide information about the powers of Parliament to vary or revoke conditions of service, remuneration, leave, and pension for certain civil service officers in India. The context also mentions that Part XI was substituted by a new part, but without further details on what those changes were.