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NLRB Defines Employers' Right to Change Unmentioned Terms in CBA with Zipper Clause

If you’re gearing up for union negotiations in 2024, don’t miss the opportunity to review current and past practices that may not have been incorporated into expiring collective bargaining agreements (CBAs).  It will be worth the effort to dig up and review all of the side letters, settlements and memoranda of agreement that the parties have entered into since the last CBA was signed.  You may want to urge the union to engage in that effort too, especially if you intend to propose or freshen up an integration or zipper clause.

What’s the difference?

On Dec. 28, 2023, the National Labor Relations Board (NLRB) issued a decision in Twinbrook OpCo LLC, where it noted that its own General Counsel mislabeled an integration clause as a zipper clause.  Although the two terms are often used interchangeably, the NLRB explained that an integration clause “‘exclud[es] from coverage any external agreements not made an explicit part of the parties’ collective bargaining agreement,’” while a zipper clause states “that the parties have had the opportunity to bargain over all mandatory subjects of bargaining and that they waive their right to bargain over such matters during the term of the agreement.”  

Why does it matter?  A brief case study.

Twinbrook OpCo purchased a skilled nursing facility and offered its employees continued employment, at their same rate of pay.  Then, Twinbrook OpCo continued the prior owner’s practice of paying bargaining unit employees a shift differential for working second or third shifts.  The company even increased the amount of that shift differential, without notifying the union that represented those employees or giving the union an opportunity to bargain over the change.  Eventually, Twinbrook OpCo and the union agreed upon terms for their own CBA, which (a) did not include any reference to a shift differential; (b) provided that no employee’s rate would be lowered; and (c) contained an integration clause that provided:

This Agreement represents the entire understanding between the parties’ and there are no agreements, conditions, or understandings, either oral or written, other than as set forth herein.  It is further agreed that no amendment, change, modification or addition to this Agreement shall be binding upon either party hereto, unless reduced to writing and signed by both of the parties.

Twinbrook OpCo paid that increased shift differential for the first pay period covered by the new CBA before discontinuing the practice entirely, without notifying the union.

The union then filed an unfair labor practice charge, asserting that the company violated Section 8(a)(1) and (5) of the National Labor Relations Act when it ceased making the shift differential payments without providing the union with notice and the opportunity to bargain.  The NLRB sided with the union, holding that (1) the CBA did not authorize the company to unilaterally eliminate shift differential payments and (2) the union did not waive its right to bargain over the termination of those payments.

In short, the integration clause was not a clear and unmistakable waiver of the union’s right to bargain over a change in a mandatory subject of bargaining.

So, what should we do?

If you are on your company’s or chapter’s bargaining team, two things should be at the top of your list when it comes to integration clauses and zipper clauses.  First, prepare.  Second, establish a clear record of bargaining. Further suggestions:

  • Get all of those past practices, settlements, side letters and memoranda of understanding out on the table. If both parties agree that a practice should continue, incorporate it into the CBA.
  • If the parties do not agree to incorporate a practice or agreement into the new CBA, make it very clear that the practice will cease with the expiration of the old CBA.
  • If your CBA does not already have a zipper clause and/or an integration clause, propose them.
  • If your CBA does contain these tools, make them a distinct part of the negotiations. Make it clear that the parties are starting the new CBA’s term with a clean slate; that any past practices and agreements are superseded by the terms of the new CBA; and that the parties have waived any right to negotiate over matters contained in the CBA.

Editor’s Note:  This article was written by guest author Jennifer Will of the law firm McNees Wallace & Nurick LLC and republished by AGC with permission. Nothing in the article should be considered or relied upon as legal advice. Readers are advised to contact the author or another attorney for advice on how the law applies to any specific circumstances.

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