Versions of s. 25(1)
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Notwithstanding anything in this Part, where the Board is satisfied that a trade union is so dominated or influenced by an employer that the fitness of the trade union to represent employees of the employer for the purpose of collective bargaining is impaired, the Board shall not certify the trade union as the bargaining agent for any unit comprised of employees of the employer and any collective agreement between the trade union and the employer that applies to any such employees shall be deemed not to be a collective agreement for the purposes of this Part.