; or (B) any entity over which control is exercised or exercisable by a foreign national, foreign government, or foreign entity. (10) Substantial interest The term substantial interest has the meaning given to such term in regulations prescribed by the Committee, but does not include a voting interest of less than ten percent or ownership interests held or acquired solely for the purpose of passive investment. (11) United States business The term United States business means any entity, irrespective of the nationality of the persons that control it, engaged in interstate commerce in the United States, but only to the extent of its activities in interstate commerce. . III Improvements to the Operations of the Committee on Foreign Investment in the United States 301. Inclusion of partnership and side agreements in notice Section 721(b)(1)(C) of the Defense Production Act of 1950 ( 50 U.S.C. 4565(b)(1)(C) ) is amended by adding at the end the following: (iv) Inclusion of partnership and side agreements Subject to regulations prescribed by the Committee, the Committee may require a written notice submitted under clause (i) by a party to a covered transaction to include a copy of any partnership agreements, integration agreements, or other side agreements relating to the transaction, as specified in regulations prescribed by the Committee. . 302. Declarations relating to certain covered transactions (a) In general Section 721(b)(1)(C) of the Defense Production Act of 1950 ( 50 U.S.C. 4565(b)(1)(C) ), as amended by section 301, is further amended by adding at the end the following: (v) Declarations with respect to certain covered transactions (I) Voluntary declarations For the purpose of expediting the review of certain covered transactions that the Committee determines are likely to pose limited risk, the Committee may prescribe regulations to permit parties to the transaction to submit a declaration with basic information regarding the transaction, unless the parties submit a written notice under clause (i). (II)