zipper clause

noun
zip·​per clause

Legal Definition of zipper clause

: a clause in a labor contract indicating that the agreement is an exclusive and complete expression of consent

Note: A zipper clause may constitute a waiver of the right to bargain over issues negotiated in or outside the terms of a contract until its expiration.

History and Etymology for zipper clause

from the comparison of such a clause to the closing action of a zipper

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