The hearing, decision, and any administrative review thereof shall be conducted in conformity with sections 5-8 of the Administrative Procedure Act, and in accordance with such rules of procedure as are proper (and not inconsistent with this section) relating to the conduct of the hearing, giving of notices subsequent to those provided for in
paragraph (a) of this section, taking of testimony, exhibits, arguments and briefs, requests for findings, and other related matters. Both the Department and the applicant or recipient shall be entitled to introduce all relevant evidence on the issues as stated in the notice for hearing or as determined by the officer conducting the hearing at the outset of or during the hearing. Any person (other than a Government employee considered to be on official business) who, having been invited or requested to appear and testify as a witness on the Government's behalf, attends at a time and place scheduled for a hearing provided for by this part, may be reimbursed for his travel and actual expenses of attendance in an amount not to exceed the amount payable under the standardized travel regulations to a Government employee traveling on official business.