I don’t think this is correct. Maybe that’s for some place where there’s forced union membership? I’ve worked at places where certain departments were unionize

I don’t think this is correct. Maybe that’s for some place where there’s forced union membership? I’ve worked at places where certain departments were unionized (for example hospitality) but others were not. Far below any such 30% threshold for total employment. Also unions form at individual worksites all the time, so I sincerely doubt there’s any company-wide membership requirements. Edit: I'm correct. There's this concept of a bargaining unit, so it would only have to be workers doing a certain type of work in a certain place, generally, though it can be just those doing a certain type of work: https://www.workplacefairness.org/labor-unions#4 https://www.workplacefairness.org/labor-unions#4 A company like google could end up with hundreds of unions.