. ▁They ▁were ▁introduced ▁on ▁ 3 ▁March ▁ 2 0 1 5 . ▁ ▁Although ▁Sim p ang ▁R eng g am ▁is ▁not ▁yet ▁a ▁district ▁of ▁Joh or , ▁but ▁the ▁Sim p ang ▁R eng g am ▁District ▁Council ▁own s ▁its ▁flag . ▁The ▁Joh or ▁Bah ru ▁City ▁Council ▁also ▁own s ▁its ▁flag ▁too . ▁ ▁Ob sole te ▁state ▁flag ▁ ▁The ▁Joh ore an ▁flag ▁is ▁known ▁to ▁date ▁back ▁as ▁early ▁as ▁the ▁ 1 8 5 0 s , ▁when ▁a ▁flag ▁that ▁consisted ▁of ▁a ▁simple ▁black ▁flag ▁with ▁a ▁white ▁canton ▁sh aped ▁as ▁a ▁square ▁was ▁flow n ▁by ▁the ▁Sultan ate ▁between ▁ 1 8 5 5 ▁and ▁ 1 8 6 5 . ▁The ▁design ▁was ▁also ▁adopted ▁by ▁Tr um ong , ▁in ▁present - day ▁Indones ia . ▁ ▁Co at ▁of ▁arms ▁▁ ▁Joh or ' s ▁coat ▁of ▁arms ▁( Mal ay : ▁J ata ▁Joh or ) ▁der ives ▁its ▁layout ▁heavily ▁from ▁Western ▁her ald ry , ▁consisting ▁of ▁a ▁central ▁shield ▁to pped ▁by ▁a ▁hel m , ▁s ided ▁by ▁two ▁supp or ters , ▁and ▁includes ▁a ▁compart ment ▁and ▁mot to ▁at ▁the ▁bottom . ▁Details ▁of ▁the ▁arms ' ▁elements ▁are ▁as ▁followed : ▁ ▁Hel m ▁The ▁hel m ▁represents ▁Joh or ' s ▁royal ty , ▁and ▁is ▁symbol ised ▁by ▁a ▁blue ▁and ▁yellow ▁coron et ▁ad orn ed ▁with ▁mot ives ▁of