At the discretion of the hearing officer, and where the rights of the parties will not be prejudiced thereby, all or part of any hearing, including the testimony of witnesses, may be conducted by telephone, or other electronic means. Each party in the hearing must have an opportunity to participate effectively in, to hear, and if technically and economically feasible, to see the entire proceeding while it is taking place. Such measures may be taken to accommodate concerns raised by a complainant, a respondent, or any witness.