What is the 43rd amendment of the Indian Constitution?

The Forty-Third Amendment Act of 1977 was enacted by the Janata Government to nullify some distortions introduced by the 42nd Amendment Act of 1976. Further, it brought the following changes:

• Restored the jurisdiction of the Supreme Court and the high courts in respect of judicial review and issue of writs. 
• Deprived the Parliament of its special powers to make laws to deal with anti-national activities. 

Further Reading:

• Important Amendments in Indian Constitution
• Supreme Court of India
• Indian Judiciary

To read more about the 42nd Amendment of the Indian Constitution, aspirants can check the linked article.