The answer is agency shop.
An agency shop is a workplace where complete union membership is not necessary, but the union works as an agent for the employees. Because it is assumed that any collective bargaining by the union would benefit both union members and non-union members, both union members and non-union members must pay periodic union dues and initiation costs whether they join or not.
Agency shops are widespread in many educational environments. When employees refuse union membership but remain members of collective bargaining units, a union and a school board may enter into agency shop agreements.
Therefore, the blank will be filled by agency shop.
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