The applicant trade union was certified to represent a bargaining unit.
Subsequently, the intervener trade union applied for certification for essentially the same group of employees and sought reconsideration of the earlier certificate, arguing it was issued during a period of build-up.
Another trade union also sought to intervene.
The applicant and respondent challenged the status of both unions to intervene following the issuance of a certificate.
The Board held that a trade union representing at least one employee in the bargaining unit has the necessary degree of interest to attain party status.
As both intervening unions met this requirement, the Board granted them intervener status to seek reconsideration of the earlier decision.