Section 1213.5 - Complaints from a person(a)General. Any person that has a business relationship with a regulated entity or the Office of Finance may submit a complaint in accordance with procedures established by the Ombudsman.(b)Matters subject to complaint. A person may submit a complaint regarding any matter relating to the regulation and supervision of a regulated entity or the Office of Finance by FHFA that is not a matter in litigation, arbitration, or mediation. The Ombudsman may further define what matters are subject to complaints.