[3] On 7 March 2006, as the newly appointed ambassador to Myanmar, Yusof was presented his letters of accreditations by Sultan Hassanal Bolkiah at the Istana Nurul Iman.

[4] Once again on 10 February 2009, as the newly appointed ambassador to Germany, he was presented his letters of accreditations.

[5] Later on the 23rd, Brunei joined the International Renewable Energy Agency (IRENA), following the signing of the statute by Yusof.

[6] Yusof delivered his letter of credentials to President Bronislaw Komorowski on 20 January 2011, as the new non-resident ambassador to Poland.

[7] Yusof was bestowed the Manteri title of Yang Dimuliakan Pehin Datu Inderasugara.