zer ba ij an ▁Democratic ▁Republic . ▁ ▁Belg ium ▁ ▁A ▁revision ▁of ▁the ▁constitution ▁in ▁October ▁ 1 9 2 1 ▁( it ▁changed ▁art . ▁ 4 7 ▁of ▁the ▁Constitution ▁of ▁Belg ium ▁of ▁ 1 8 3 1 ) ▁introduced ▁the ▁general ▁right ▁to ▁vote ▁according ▁to ▁the ▁" one ▁man , ▁one ▁vote " ▁principle . ▁Art . ▁ 4 7 ▁allowed ▁wid ows ▁of ▁World ▁War   I ▁to ▁vote ▁at ▁the ▁national ▁level ▁as ▁well . ▁ ▁The ▁introduction ▁of ▁women ' s ▁suff rage ▁was ▁already ▁put ▁onto ▁the ▁ag enda ▁at ▁the ▁time , ▁by ▁means ▁of ▁including ▁an ▁article ▁in ▁the ▁constitution ▁that ▁allowed ▁appro val ▁of ▁women ' s ▁suff rage ▁by ▁special ▁law ▁( mean ing ▁it ▁needed ▁a ▁ 2 / 3 ▁majority ▁to ▁pass ). ▁This ▁happened ▁in ▁March ▁ 1 9 4 8 . ▁In ▁Belg ium , ▁voting ▁is ▁comp uls ory . ▁ ▁Bulg aria ▁Bulg aria ▁was ▁liber ated ▁from ▁Ott oman ▁rule ▁in ▁ 1 8 7 8 . ▁Although ▁the ▁first ▁adopted ▁constitution , ▁the ▁T arn ovo ▁Constitution ▁( 1 8 7 9 ), ▁gave ▁women ▁equal ▁election ▁rights , ▁in ▁fact ▁women ▁were ▁not ▁allowed ▁to ▁vote ▁and ▁to ▁be ▁elected . ▁The ▁Bulgar ian ▁Women ' s ▁Union ▁was ▁an ▁um bre lla ▁organization ▁of ▁the ▁ 2 7 ▁local ▁women ' s ▁organis ations ▁that ▁had ▁been ▁established ▁in ▁Bulg aria ▁since ▁ 1 8 7 8 .