His Majesty Sultan Haji Hassanal Bolkiah Mu’izzaddin Waddaulah ibni Al-Marhum Sultan Haji Omar ‘Ali Saifuddien Sa’adul Khairi Waddien, Sultan and Yang Di-Pertuan of Brunei Darussalam yesterday graced the 30th Civil Service Day celebration at the International Convention Centre (ICC), Berakas. His Majesty was accompanied by His Royal Highness Prince Haji Al-Muhtadee Billah, the Crown Prince