(a) The address for the Office of the Attorney General, Child Support Division, shown on the notice of an intended or actual administrative action is the proper address of record for the submission of a request for administrative review.(b) The address for the complainant shown on the notice of an intended or actual administrative action is the proper address of record for the complainant until such time as the complainant submits written notification of a change of address to the proper address of record for the Office of the Attorney General, Child Support Division. After an administrative review request has been submitted, the complainant's address on that request will be the complainant's address of record.(c) A copy of the notice of hearing and the final decision shall be mailed by first class mail to the complainant and the complainant's legal representative, if any in an administrative review.