In June 5, 1966 His Highness Sultan Haji Sir Muda Omar Ali Saifuddien abdicated in favour of his son Pengiran Muda Mahkota Hassanal Bolkiah. On January 1, 1984 Brunei Darussalam resumed full independence and the Sultan took office as Prime Minister, Finance Minister and Home Affairs Minister, presiding over a cabinet of six. In October 1986, the cabinet was expanded to 11 members, with His Majesty relinquishing the portfolios of Finance and Home Affairs and taking over the Defence portfolio which his late father had held since 1984. In 1988 another reshuffle brought about the elevation of the deputy minister to a full minister and the creation of the Ministry of Industry and Primary Resources designed to boost the country's development.