- Sikkim was granted full statehood on May 16, 1975, by the 36th Amendment Act. - Arunachal Pradesh became a full state on February 20, 1987, under the State of Arunachal Pradesh Act, 1986. - Chhattisgarh was formed out of Madhya Pradesh on November 1, 2000. - Jharkhand was formed out of Bihar on November 15, 2000.