In the event that the Association has a complaint, it shall begin at Step Three of the grievance procedure, provided the written complaint is received by the employer's Review Committee within twenty (20) calendar days following knowledge of the facts giving rise to the complaint. Such a complaint 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.