31 C.F.R. § 544.301
The terms blocked account and blocked property shall mean any account or property subject to the prohibitions in § 544.201 held in the name of a person whose property and interests in property are blocked pursuant to § 544.201(a) , or in which such person has an interest, and with respect to which payments, transfers, exportations, withdrawals, or other dealings may not be made or effected except pursuant to an authorization or license from the Office of Foreign Assets Control expressly authorizing such action.
Note to § 544.301 : See § 544.411 concerning the blocked status of property and interests in property of an entity that is directly or indirectly owned, whether individually or in the aggregate, 50 percent or more by one or more persons and interests in property are blocked pursuant to § 544.201(a) .
31 C.F.R. §544.301