▁Gust af , ▁king ▁since ▁ 1 9 7 3 , ▁the ▁plain ▁triple - ta iled ▁flag ▁has ▁flow n ▁at ▁the ▁Royal ▁Palace ▁only ▁once . ▁This ▁occurred ▁on ▁ 2 - 3 ▁July ▁ 1 9 8 8 , ▁when ▁the ▁King ▁went ▁on ▁a ▁private ▁visit ▁to ▁W upp ert al , ▁Germany ; ▁at ▁the ▁same ▁time , ▁the ▁Duke ▁of ▁Hall and , ▁his ▁uncle ▁and ▁the ▁only ▁person ▁in ▁the ▁line ▁of ▁succession , ▁was ▁on ▁a ▁private ▁visit ▁to ▁Sainte - Max ime , ▁France . ▁The ▁Government ▁therefore ▁ordered ▁the ▁Spe aker ▁of ▁the ▁R ik sd ag , ▁In gem und ▁Beng t sson , ▁to ▁serve ▁as ▁Reg ent ▁ad ▁inter im ▁for ▁two ▁days . ▁ ▁Private ▁use ▁of ▁the ▁State ▁flag ▁There ▁have ▁been ▁a ▁few ▁notable ▁exem ptions ▁regarding ▁the ▁prohib ition ▁of ▁private ▁parties ▁to ▁use ▁the ▁State ▁flag . ▁All ▁these ▁privileges ▁were ▁terminated ▁in ▁accord ance ▁with ▁the ▁new ▁specific ▁flag ▁reg ulation ▁of ▁ 2 2 ▁June ▁ 1 9 0 6 . ▁ ▁According ▁to ▁a ▁royal ▁war rant ▁of ▁ 3 1 ▁October ▁ 1 7 8 6 , ▁the ▁Swedish ▁East ▁India ▁Company ▁had ▁the ▁right ▁to ▁use ▁the ▁triple - ta iled ▁war ▁en sign ▁in ▁" Ind ian ▁waters ", ▁when ▁not ▁being ▁under ▁immediate ▁protection ▁by ▁the ▁Swedish ▁n avy . ▁In ▁the ▁merchant ▁fleet , ▁there ▁was ▁a ▁common ▁practice ▁to ▁il leg ally ▁use ▁the ▁war ▁en