1 8 1 8 . ▁It ▁was ▁provided ▁in ▁section ▁ 1 1 ▁of ▁the ▁Royal ▁dec ree ▁that ▁the ▁flag ▁of ▁the ▁Sultan ate ▁of ▁R ia u ▁should ▁be ▁black ▁with ▁a ▁white ▁canton . ▁The ▁similar ▁flag ▁design ▁was ▁also ▁adopted ▁by ▁its ▁sister ▁state ▁of ▁Joh or . ▁ ▁Royal ▁and ▁noble ▁ranks ▁ ▁Royal ▁family ▁ ▁Sultan : ▁The ▁reign ing ▁prince ▁was ▁sty led ▁the ▁Sultan ▁( person al ▁reign ▁name ) ▁i b ni ▁al - Mar hum ▁( father ' s ▁title ▁and ▁personal ▁name ), ▁Sultan ▁of ▁R ia u , ▁L ing ga ▁and ▁dependencies , ▁with ▁the ▁style ▁of ▁His ▁High ness . ▁ ▁T eng ku ▁A mp uan : ▁The ▁senior ▁cons ort ▁of ▁the ▁r uling ▁prince . ▁ ▁T eng ku ▁Bes ar : ▁The ▁He ir ▁Appar ent . ▁ ▁T eng ku ▁Bes ar ▁Per emp uan : ▁The ▁cons ort ▁of ▁the ▁He ir ▁Appar ent . ▁ ▁T eng ku ▁M uda : ▁The ▁He ir ▁Pres um pt ive ▁ ▁T eng ku ▁M uda ▁Per emp uan : ▁The ▁cons ort ▁of ▁the ▁He ir ▁Pres um pt ive . ▁ ▁T eng ku : ▁The ▁other ▁sons , ▁daughters ▁and ▁descend ants ▁of ▁S ult ans , ▁in ▁the ▁male ▁line : ▁They ▁would ▁be ▁sty led ▁as ▁T eng ku ▁( person al ▁name ) ▁i b ni ▁al - Mar hum ▁( father ' s ▁title ▁and ▁personal ▁name