The applicant trade union applied for certification.
A group of objecting employees sent a petition to the Board by Priority Post on the terminal date.
The union argued that Priority Post was not 'registered mail' as required by the Board's Rules of Practice and Notice to Employees, relying on a previous Board decision.
The Board declined to follow its previous decision, finding that Priority Post provides a written record of receipt with date and time of acceptance by the Post Office, which satisfies the registrable elements of registered mail.
The Board accepted the petition as timely.