31 CFR §515.515

1. (a)Transactions ordinarily incident to the transfer of securities from a blocked account in the name of any person to a blocked account in the same name in a domestic bank are hereby authorized provided such securities shall not be transferred from any blocked account if such transfer represents, directly or indirectly, a transfer of the interest of a designated national to any other country or person.
2. (b)This section does not authorize the transfer of securities held in a blocked account or subaccount thereof to a blocked account or subaccount under any name or designation which differs from the name or designation of the specific blocked account or subaccount in which such securities were held.