Union Security Agreement: A contract between an employer and a labor union that specifies the relationship between the employer and the union, including requirements for union membership.
Union Shop: A type of union security agreement where employees are not required to join the union before being hired, but must join the union within a certain period of time after being hired.
Right-to-Work Laws:State laws that prohibit union security agreements that require employees to join a union or pay union dues as a condition of employment.