- Preamble can be amended, subject to the condition that no amendment is done to the ‘basic features’– the fundamental features of the Constitution as contained in the Preamble cannot be altered by an amendment under Article 368
- Preamble has been amended only once so far, in 1976, by the 42nd Constitutional Amendment Act, which has added three new words–Socialist, Secular and Integrity–to the Preamble.