An accredited processor desiring to discontinue the use of licensed inspectors for making official inspections, gradings, and certifications of naval stores, shall give not less than 30 days notice in writing to the Administrator of the intention to discontinue such service. At the termination of the service such processor shall surrender to the authorized representative of the Administrator the permit for licensed inspection, together with all unused certificates, forms, or other supplies and equipment furnished by the Department and held by the processor for the use of his licensed inspectors, other than standards or such other material as may be covered by a separate loan application or agreement.