The union filed a policy grievance alleging that the employer's use of a sign-up sheet to canvass for overtime violated the collective agreement.
The collective agreement required that overtime be offered to full-time employees on a rotational basis before being offered to part-time or casual employees.
The arbitrator found that the sign-up process, which offered only 'possible' overtime simultaneously to all employees and required employees to take the initiative to sign up, was inconsistent with the mandatory language of the collective agreement.
The grievance was allowed and a declaration issued that the sign-up process violated the collective agreement.