If an officer, employee, or committee of an agency makes an adverse decision, the agency shall hold, at the request of the participant, an informal hearing on the decision. With respect to programs carried out through the Consolidated Farm Service Agency (or other office, agency, or administrative unit of the Department assigned to carry out the programs authorized for the Consolidated Farm Service Agency under section 6932 of this title), the Secretary shall maintain the informal appeals process applicable to such programs, as in effect on October 13, 1994. If a mediation program is available under title V of the Agricultural Credit Act of 1987 (7 U.S.C. 5101 et seq.) as a part of the informal hearing process, the participant shall be offered the right to choose such mediation