The watchdog changed the report's disposition from a declined criminal prosecution to a declined civil-enforcement action on August 3.

The NLRB told workers behind the charges that a record caseload could delay them, and one has been open for over 15 months.

Thirty-six full- and part-time staff at the Amherst museum are organizing with UAW Local 2110.

The gallery blamed a communication gap and a cyberattack for its delayed response to the controversy.

The charge was filed on May 6 and the case remains open.

The museum posted a workers' rights notice for 60 days, and the NLRB closed the case days before the union announced its first contract.

A June 29 decision would end 23 union members' jobs on August 14 and outsource their work to a private contractor.

The wave of government-backed cultural districts that reshaped Asia and the Persian Gulf is entering a more difficult phase.