The inspector shall sign and issue certificates in forms approved by the Administrator for animal products, if the inspector finds that the requirements as stated in the certification have been met. The original and one copy of each certificate shall be furnished to the applicant, and one copy of each certificate shall be retained by the Department until disposal is authorized in accordance with law. Additional copies may be furnished the applicant at his request upon payment of the fees prescribed in § 156.7. Copies of the certificates may be furnished without charge to other properly interested Federal agencies or under compulsory process.