31 C.F.R. § 586.511 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 the United States and the FRY (S&M) are authorized, provided that mail is limited to personal communications not involving a transfer of anything of value.
Title 31: Money and Finance: Treasury
PART 586—FEDERAL REPUBLIC OF YUGOSLAVIA (SERBIA & MONTENEGRO) KOSOVO SANCTIONS REGULATIONS
Subpart E—Licenses, Authorizations, and Statements of Licensing Policy
§ 586.511 Transactions related to mail authorized.

