Step 1: Background of the Ninth Schedule.
The Ninth Schedule was introduced to protect certain laws, especially land reform and agrarian reform laws, from being challenged in courts on the grounds of violation of Fundamental Rights.
Step 2: Constitutional amendment.
The Ninth Schedule was added to the Constitution by the First Amendment Act, 1951. This amendment was one of the earliest major changes made to the Constitution after its adoption.
Step 3: Purpose of the amendment.
The main intention behind the First Amendment was to implement social reforms without judicial interference, ensuring rapid progress in areas like land redistribution.
Step 4: Conclusion.
Therefore, the Ninth Schedule was added through the First Constitutional Amendment.