The applicant union filed a displacement application for certification, initially proposing a single full-time bargaining unit.
The intervenor union and the employer took varying positions on whether there were one or two bargaining units (full-time and part-time).
After the representation vote, the applicant sought to amend its position to either seek two certificates or a combined unit.
The intervenor argued that amending the proposed unit after the employer's response undermined the section 8.1 objection process.
The Board held that amendments are permissible absent prejudice, and that the employer had effectively abandoned its section 8.1 objection.
Relying on its plenary jurisdiction under section 6(1) of the Act, the Board directed the counting of the part-time ballots and indicated it would issue two certificates if the applicant prevailed.