Which Amendment Act of Jammu and Kashmir Constitution inserted 8 members instead of 6 members, who are nominated by the State Governor to the Legislative Council of Jammu and Kashmir?

5^th Amendment Act, 1963 came into existence on 14^th October, 1963. By this Amendment Act, Clauses (c) and (d) of Section 50 (4) have been omitted. In Section 50 (6), 8 members instead of 6 are inserted which are nominated by the Governor of the State from different areas like Science, Art, Literature, Cooperative Movement, etc. to the Legislative Council of Jammu and Kashmir.