; or (ii) an entity in which an entity described in clause (i) has an ownership interest of 50 percent or more. (4) Blocking the assets of certain Russian state-owned entities (A) In general The Secretary of the Treasury shall, pursuant to the International Emergency Economic Powers Act ( 50 U.S.C. 1701 et seq.), block and prohibit all transactions in all property and interests in property of any entity described in subparagraph (B) in which the Government of the Russian Federation has an ownership interest of 25 percent or more if such property and interests in property are in the United States, come within the United States, or are or come within the possession or control of a United States person. (B) Entities described The entities described in this subparagraph are the following: (i) Any entity in the railway or metals and mining sector of the economy of the Russian Federation. (ii) Any aerospace company or air carrier, including any subsidiary of such a company or carrier. (5) Blocking the assets of entities acquired by Russian state-owned entities The Secretary of the Treasury shall, pursuant to the International Emergency Economic Powers Act ( 50 U.S.C. 1701 et seq.), block and prohibit all transactions in all property and interests in property of any entity in which an entity owned 50 percent or more in the aggregate by the Government of the Russian Federation acquires, on or after the date of the enactment of this Act, an ownership interest of 20 percent or more if such property and interests in property are in the United States, come within the United States, or are or come within the possession or control of a United States person. (6) Prohibition on transactions involving certain Russian debt The Secretary of the Treasury shall, pursuant to such regulations as the Secretary may prescribe, prohibit all transactions within the United States or by a United States person, in— (A) sovereign debt of the Government of the Russian Federation issued on or after the date of the enactment of this Act, including