What were the two sections added to the Constitution by the First and Fourth Amendments in 1951 and 1955 respectively?
The two sections added to the Constitution by the First and Fourth Amendments in 1951 and 1955 respectively were not mentioned directly in the provided context. However, they were indirectly mentioned as follows:

1. Added by the Constitution (First Amendment) Act, 1951, s. 14 (w.e.f. 18 -6-1951).
2. Added by the Constitution (Fourth Amendment) Act, 1955, s. 5 (w.e.f. 27 -4-1955).