31 CFR § 560.508 - Telecommunications and mail transactions authorized.
(a) All transactions with respect to the receipt and transmission of telecommunications involving Iran are authorized. This section does not authorize the provision, sale, or lease to Iran, the Government of Iran, an Iranian financial institution, or any other person whose property and interests in property are blocked pursuant to § 560.211 of telecommunications equipment or technology; nor does it authorize the provision, sale, or leasing of capacity on telecommunications transmission facilities (such as satellite or terrestrial network connectivity).
(b) Paragraph (a) of this section does not authorize any transaction by an entity owned or controlled by a United States person and established or maintained outside the United States otherwise prohibited by § 560.215 if the transaction would be prohibited by any other part of this chapter V if engaged in by a U.S. person or in the United States.
(c) 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 Iran are authorized, provided that mail is limited to personal communications not involving a transfer of anything of value. For purposes of this section, the term mail includes parcels only to the extent the parcels contain goods exempted from the prohibitions contained in this part or otherwise eligible for importation from or exportation to Iran under a general or specific license.
The following state regulations pages link to this page.