 He continued a Member of Parliament until 2003, when he resigned in protest to the amendment to the Constitution by which the parliament extended its tenure for a further 2 years, which Bin Shamlan deemed an unconstitutional move and resigned on the ground that his 4-year mandate by the people is over.He was appointed as Minister of Oil and Mineral Resources from October 1994, which he accepted on the condition that he would have power to reorganize and reform the Ministry.In March 1995, he resigned.