How Puducherry became a Union Territory with its own Legislative Assembly
Background
On November 1, 1954, the French possessions in India were de facto transferred to the Indian Union and Puducherry became a Union Territory. But only in 1963 Puducherry became officially an integral part of India after the French Parliament in Paris ratified the Treaty with India. In the year 1963, the Parliament enacted the Government of Union Territories Act which provides for Legislative Assemblies and Council of Ministers in the Union Territories. In exercise of the powers conferred by Article 239 of the Constitution of India and Section 46 of the Government of Union Territories Act 1963, the President of India has framed the Business of the Government of Puducherry (Allocation) Rules, 1963. The Centre is represented by the Lt. Governor, who resides at the Raj Nivas at the Park, the former palace of the French Governor. The French period of Puducherry had begun when Bellanger, a French officer, took up residence in the Danish Lodge in Puducherry, and Francois Martin became the first Governor who transformed the fishing village into a flourishing port-town.
In plain words
de facto transfer de facto transfer — A handover that takes effect in practice, with the administration actually changing hands, before the legal formalities are completed.
de jure union de jure union — The union as completed in law, here only after the treaty between India and France was ratified.
Raj Nivas Raj Nivas — The residence of the Lieutenant Governor in Puducherry, formerly the palace of the French Governor.