31 C.F.R. § 594.509 Transactions related to mail authorized.
Title 31 - Money and Finance: Treasury
All transactions by U.S. persons, including payment and transfers to common carriers, incident to the receipt or transmission of mail between a U.S. person and a person whose property or interests in property are blocked pursuant to §594.201(a) are authorized, provided the mail is limited to personal communications not involving a transfer of anything of value and not exceeding 12 ounces in weight.
Title 31: Money and Finance: Treasury
PART 594—GLOBAL TERRORISM SANCTIONS REGULATIONS
Subpart E—Licenses, Authorizations and Statements of Licensing Policy
§ 594.509 Transactions related to mail authorized.
