The first Sarawak Chief Minister was Datuk Stephen Kalong Ningkan, who was removed as the chief minister in 1966 after court proceedings and amendments to both the Sarawak state constitution and the Malaysian federal constitution due to some disagreements with regards to the 18-point Agreement as conditions for the formation of Malaysia. Datuk Penghulu Tawi Sli was appointed as the second Sarawak chief minister who was a soft-spoken seat-warmer fellow and then replaced by Tuanku Abdul Rahman Ya'kub (a Melanau Muslim) as the third Sarawak chief minister in 1970 who in turn was succeeded by Abdul Taib Mahmud (a Melanau Muslim) in 1981 as fourth Sarawak chief minister. After Taib Mahmud resigned on 28 February 2014 to become the next Sarawak's governor, he appointed his brother-in-law, Adenan Satem, as the next Sarawak Chief Minister, who has in turn been succeeded by Abang Johari Openg in 2017.