As an HR Professional you should be familiar with the terminology, practices, and rules governing unions and management in the bargaining process. What is the zipper clause in regard to negotiations?

The zipper clause does the opposite - it prevents items from being reopened repeatedly; continuous reopening would defeat the purpose of a signed agreement.

The zipper clause has no relation to restricting management's access to union meetings; it exclusively governs the finality of negotiated contract terms.

Excluding parties from employee meetings is unrelated to the zipper clause; the clause governs contract term finality, not meeting access.

Once both parties sign the collective bargaining agreement, the zipper clause bars either side from reopening negotiations on any item within the contract for the duration of the agreement. This protects the finality and integrity of all negotiated terms. It effectively locks all provisions in place until the contract expires and a new round of bargaining begins.