The 16th Amendment Act, 1963
The 16th Amendment Act was also called the Constitution (Sixteenth Amendment) Act 1963. The abovementioned amendment was made to various clauses in Article 19 of the Indian constitution.
Maintaining the integrity and sovereignty of the country was the main point behind the amendment. It added a few more restrictions to the fundamental right to speech and expression of the Indian citizens in order to prevent any such activity which may hurt the integrity of the nation. It maintains that any kind of social group must be formed in a peaceful manner abiding by the laws, and should be done with the idea of protecting India's sovereignty and integrity at all costs. It also demands the same from the government servants that they maintain the same while taking oaths ahead of their undertaking of responsibility.