Tenth Amendment of the Constitution of India of Goa, Daman and Diu in 1961, and KG Badlani, an officer of the Indian Administrative Service (IAS) was designated Prime Minister of Dadra and Nagar Haveli for one day, so that, as head of state, he could sign an agreement with Prime Minister Jawaharlal Nehru to merge Dadra and Nagar Haveli formally with the Republic of India. On 31 December 1974, a treaty was signed between India and Portugal recognising India's sovereignty over Goa, Daman, Diu, Dadra and Nagar Haveli. The Portuguese occupied Nagar Haveli on 10 June 1783 on the basis of Friendship Treaty executed on 17 December
Prime Minister of India to prove majority when instructed by the president. India follows a parliamentary system in which the prime minister is the presiding head of the government and chief of the executive of the government. In such systems, the head of state, or, the head of state's official representative (i.e., the monarch, president, or governor-general) usually holds a purely ceremonial position and acts—on most matters—only on the advice of the prime minister. The prime minister—if they are not already—shall become a member of parliament within six months of beginning his/her tenure. A prime minister is expected to work with other central ministers