Claim: In Republic Presidencies and Executive Councils, Jakov Blažević took office on April 1978 and Raif Dizdarević on May 1978.
Evidence: Jakov Blažević (24 March 1912 – 10 December 1996) was a Croatian politician who served as president of the Executive Council of the People's Republic of Croatia, a constituent Republic of the Federal People's Republic of Yugoslavia, from 18 December 1953 to 10 July 1962.