Section 14(b) of the federal Taft-Hartley Act grants every state and U.S. Territory the ability to enact Right to Work laws prohibiting compulsory union membership dues and “fees” as a condition of employment.
The 1935 National Labor Relations Act (NLRA) authorized closed shops and forced union dues.
But, it (NLRA) was amended in 1947 by Section 14(b) of the Taft-Hartley Act, which allows states to protect their citizens and opt out of the abusive federal forced-unionism policy.