Where an unlawful practice alleged in a verified complaint adversely affects, in a similar manner, a group or class of persons of which the aggrieved person filing the complaint is a member, or where such an unlawful practice raises questions of law or fact which are common to such a group or class, the aggrieved person or the director may file the complaint on behalf and as representative of such a group or class. Any complaint so filed may be investigated as a group or class complaint, and, if in the judgment of the director circumstances warrant, shall be treated as such for purposes of conciliation, dispute resolution, and civil action.