The consolidation of the locals is a matter that is subject to the bylaws and rules of the local and the international. However, such an endeavor would be pretty expensive. Also,
even if the international does not strictly follow all of the rules, the odds are probably low that a court would interfere with the union's internal affairs.
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As long as you have standing, you can host a challenge. However, it would be a very long uphill battle.
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