No corporation, company, association, person, or fund shall write insurance under this Act without first having received from the OWCP a certificate of authority to write such insurance. Any such certificate issued by the Office, after application therefor in accordance with these regulations, may authorize the applicant to write such insurance in a limited territory as determined by the Office. Any such certificate may be suspended or revoked by the Office prior to its expiration for good cause shown, but no suspension or revocation shall affect the liability of any carrier already incurred. Good cause shall include, without limitation, the failure to maintain in such limited territory a regular business office with full authority to act on all matters falling within the Act, and the failure to promptly and properly perform the carrier's responsibilities under the Act and these regulations, with special emphasis upon lack of promptness in making payments when due, upon failure to furnish appropriate medical care, and upon attempts to offer to, or urge upon, claimants inequitable settlements. A hearing may be requested by the aggrieved party and shall be held before the Director or his representative prior to the taking of any adverse action under this section.