Explanation:

About Shimla History :  After independence the Chief Commissioner's Province of H.P. came into being on 15 April 1948 as a result of integration of 28 petty princely states (including feudatory princes and zaildars) in the promontories of the western Himalaya, known in full as the Shimla Hills States & four Punjab southern hill states by issue of the Himachal Pradesh (Administration) Order, 1948 under Sections 3 & 4 of the Extra-Provincial Jurisdiction Act, 1947 (later renamed as the Foreign Jurisdiction Act, 1947 vide A.O. of 1950). The State of Bilaspur was merged in the Himachal Pradesh on 1 April 1954 by the Himachal Pradesh and Bilaspur (New State) Act, 1954. Himachal became a part C state on 26 January 1950 with the implementation of the Constitution of India and the Lt. Governor was appointed.