Crossword clues for Union requirement:OPENSHOPIt doesn't require union membershipMARRIAGELICENSEUnion requirement?DUESUnion requirementOPENSHOPEstablishment not requiring union membershipPRENUPUnion requirement, maybe?CLOSEDSHOPBusiness that requires union membership before hiringDUESRequirement for union membershipOPENSHOPWhere union membership isn't required
