저는 노동법 변호사는 아닙니다. 하지만, 제가 알고 있는 상식선에서 말씀을 드린다면 노조를 조인을 하거나 만드는것은 법적인 권리인것으로 알고 있읍니다. 간단한 인포를 아래 복사 해서 보내 드립니다.
Yes, you normally have a legal right to do so.
Your union can bargain collectively with your employer for better employee wages and benefits, and better working conditions. And your employer cannot interfere with your participation in lawful union strikes or meetings with fellow employees.
Unions, too, must stay within certain legal bounds in their dealings with you. For example, union agents cannot threaten you with the loss of your job if you refuse to support union activities. Nor can they refuse to handle your job grievance for arbitrary reasons. Unions have a legal duty of fair representation to all of the workers in the union's bargaining unit.
For more information on your rights as a union member, contact your union representative, your local labor council, the U.S. Department of Labor's Office of Labor Management Standards (regarding internal union matters), or the National Labor Relations Board (or, if you are a California state or local government worker, the Public Employment Relations Board).