After India`s independence in 1947, a treaty between the Chogyal of Sikkim Palden Thondup Namgyal and Indian Prime Minister Jawaharlal Nehru gave India high authority over the Kingdom of Sikkim in exchange for maintaining its independence. This lasted until 1975, when the Sikkimean monarchy was abolished in favor of a merger with India. Sikkim is today one of the states of India. a) Title/preamble. It identified the donor of the contract, its titles and the nature of the relationship between these parties (whether parity or sovereignty). In Suzerainty`s contracts, the vassal was bound by an exclusive relationship with the Suzerain. One of the ways european states attempted to describe the relationship between the Qing Dynasty and its peripheral regions was sovereignty, although this does not entirely fit traditional Chinese diplomatic theory.