Upon obtaining his ruling powers, Man Singh embarked on a programme of modernisation, creating infrastructure and founding numerous public institutions that would later result in Jaipur being selected the capital of Rajasthan. At the time of the Independence of British India in 1947, the maharaja delayed acceding Jaipur to the Dominion of India. He finally signed an Instrument of Accession in April 1949, when his princely state became part of the Rajasthan States Union, initially retaining his powers of internal government. The Maharaja became Rajpramukh of the States Union, but the office was abolished when the Indian states were further re-organised in 1956. Although the Indian princes had by then relinquished their ruling powers, they remained entitled to their titles, privy purses, and other privileges until the adoption of the 26th amendment to the Constitution of India on 28 December 1971. Accordingly, Sir Man Singh II remained Maharaja of Jaipur until his death.