EMPLOYER REFUSAL TO BARGAIN IN GOOD FAITH; DEFENSES – Waiver by Union; Contract Waivers; Bargaining History Estoppel; Disclaimer; Supersession

Single Topic for Decision 0684E

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Zipper clause does not allow the employer to make unilateral changes in the status quo. Regardless of the existence of a zipper clause, neither party to collective bargaining agreement has a duty to negotiate over any matter covered by the agreement during its term. Board will examine language of the zipper clause and will give it the breadth the language warrants.