The local agency may provide financing to any participating party for the purpose of historical rehabilitation authorized pursuant to an historical rehabilitation financing program. All agreements for loans shall provide that the architectural and engineering design of the historical rehabilitation shall be subject to the standards which may be established by the local agency and that the work of historical rehabilitation shall be subject to any supervision the local agency deems necessary. The local agency may provide financing to any qualified mortgage lender provided that the qualified mortgage lender shall use the financing to provide financing to any participating party for the purpose of historical rehabilitation authorized pursuant to a historical rehabilitation financing program pursuant to this chapter.