Some things in the KH used to be put to the vote.... expenditures usually. I dont know if they still do ( difficult by zoom!) So much these days is dictated by central Bethel.
The question was really about political voting for governments. I always believed that article that said it was a conscience thing was a sop to the public authorities because in reality W T forbids such voting .
Whether today is is a disfellowshipping matter , I am not sure .The Shepherd the Flock book is not specific.