In 1961, amidst Indian preparation for the invasion of Goa, Daman, and Diu, K.G. Badlani, an officer of the Indian Administrative Service was, for one day, designated the Prime Minister of Dadra and Nagar Haveli, so that, as Head of State, he could sign an agreement with the Prime Minister of India, Jawaharlal Nehru, and formally merge Dadra and Nagar Haveli with the Republic of India. The Tenth Amendment of the Constitution of India was passed to incorporate Dadra and Nagar Haveli as a union territory, effective 11 August 1961.