In the event that the Association has a grievance, it shall begin at Step Three of the grievance procedure, provided the written complaint is received by the Director of Labor Relations or designee within twenty (20) calendar days following knowledge of the facts giving rise to the complaint. Such a grievance shall be submitted by the Association President, or the president's designated representative, on behalf of the Association or on behalf of more than one Employee involving a common fact situation and the same provision(s) of the Agreement.