19 C.F.R. § 113.25 Seals.
Title 19 - Customs Duties
When a seal is required, the seal shall be affixed adjoining the signatures of principal and surety, if individuals, and the corporate seal shall be affixed close to the signatures of persons signing on behalf of a corporation. Bonds shall be under seal in accordance with the law of the state in which executed. However, when the charter or governing statute of a corporation requires its acts to be evidenced by its corporate seal, such seal is required.
Title 19: Customs Duties
PART 113—CUSTOMS BONDS
Subpart C—Bond Requirements
§ 113.25 Seals.