SHORT ANSWER:
The key provisions of the 42nd Amendment that were challenged in the Supreme Court include changes to the basic structure of the Constitution.
DETAILS:
- The 42nd Amendment, enacted in 1976, made significant changes to the Constitution, including the addition of the words "Socialist" and "Secular" to the Preamble.
- It also curtailed the power of judicial review and increased the power of Parliament to amend the Constitution.
- The amendment faced challenges regarding its validity and whether it violated the basic structure doctrine established by the Supreme Court.
PUNISHMENT / IMPLICATIONS (if applicable):
- The Supreme Court ruled that Parliament cannot alter the basic structure of the Constitution.
SOURCE:
- Constitution of India, Supreme Court Judgments
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