The Secretary may revoke approval of an approved work sharing plan for good cause, including: conduct or an occurrence that tends to defeat the intent and effective operation of the approved work sharing plan; failure to comply with an assurance in the approved work sharing plan; unreasonable revision of a productivity standard of the affected unit; and violation of a criterion on which the Secretary based approval of the approved work sharing plan. The decision of the Secretary to revoke approval of a work sharing plan is final and is not subject to appeal.