42 C.F.R. § 71.43 Exemption for mails.
Title 42 - Public Health
Except to the extent that mail contains any article or thing subject to restrictions under subpart F of this part, nothing in the regulations in this part shall render liable to detention, disinfection, or destruction any mail conveyed under the authority of the postal administration of the United States or of any other Government.
Title 42: Public Health
PART 71—FOREIGN QUARANTINE
Subpart E—Requirements Upon Arrival at U.S. Ports: Sanitary Inspection
§ 71.43 Exemption for mails.