Another area that has been left to the states is the protection of a worker's right not to join a union. Many states have a so-called “right-to-work” law that prohibits compulsory union membership. Maryland is not among them. However, Maryland does have a law stating that an express, implied, oral, or written promise between an employer and a prospective employee is against public policy if it requires either party (MD Lab. and Empl. Code Sec. 4-304):
• To join/remain a member of an employer or labor organization
• Not to join/not to remain a member of an employer or labor organization
• To withdraw from an employment relationship if the party joins/remains a member
Employers who under a collective bargaining agreement deduct dues from an employee's pay for a union must make the payment within 30 days after it is required (MD Lab. ...