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97 STAT. 120 PUBLIC LAW 98-21—APR. 20, 1983 ration" and inserting in lieu thereof "another entity in which such American employer has not less than a 10-percent interest (within Ante, p. 118. the meaning of section 3121(1)(8)(B))". 26 use 406. (C)(i) So much of subsection (d) of such section 406 as precedes paragraph (1) thereof is amended by striking out "another corpora- tion and inserting in lieu thereof "another taxpayer". (ii) Paragraph (1) of subsection (d) of such section 406 is amended by striking out "any other corporation" and inserting in lieu thereof "any other taxpayer". (D)(i) The heading of such section 406 is amended to read as follows: "SEC. 406. EMPLOYEES OF FOREIGN AFFILIATES COVERED BY SECTION 3121(1) AGREEMENTS.". (ii) The table of sections for subpart A of part I of subchapter D of chapter 1 of such Code is amended by striking out the item relating to section 406 and inserting in lieu thereof the following: "Sec. 406. Employees of foreign affiliates covered by section 3121(1) agree- ments." (3) Clause (A) of the second sentence of section 1402(b) of such 26 use 1402. Code (defining self-employment income) is amended by striking out "employees of foreign subsidiaries of domestic corporations" and inserting in lieu thereof "employees of foreign affiliates of American employers". 26 use 6413. (4)(A) Subparagraph (C) of section 6413(c)(2) of such Code (relating to special refunds of PICA taxes in the case of employees of certain foreign corporations) is amended— (i) by striking out "FOREIGN CORPORATIONS" in the heading and inserting in lieu thereof "FOREIGN AFFIUATES", and (ii) by striking out "domestic corporation" in the text and inserting in lieu thereof "American employer". (B) The heading of paragraph (2) of section 6413(c) of such Code is amended by striking out "FOREIGN CORPORATIONS" and inserting in lieu thereof "FOREIGN AFFILIATES". Effective dates. (f)(1)(A) The amendments made by this section (other than subsec- 26 use 406 note, ^JQJJ (^J)) gjj^u apply to agreements entered into after the date of the enactment of this Act. (B) At the election of any American employer, the amendments made by this section (other than subsection (d)) shall also apply to any agreement entered into on or before the date of the enactment of this Act. Any such election shall be made at such time and in such manner as the Secretary may by regulations prescribe. (2)(A) The amendments made by subsection (d) shall apply to plans established after the date of the enactment of this Act. (B) At the election of any domestic parent corporation the amend- ments made by subsection (d) shall also apply to any plan estab- lished on or before the date of the enactment of this Act. Any such election shall be made at such time and in such manner as the Secretary may by regulations prescribe. EXTENSION OF COVERAGE BY INTERNATIONAL SOCIAL SECURFFY AGREEMENT 42 use 410. SEC. 322. (a)(1) Section 210(a) of the Social Security Act (as amended by sections 321(b) and 323(a)(2) of this Act) is further amended, in the matter preceding paragraph (1)— (A) by striking out "either" before "(A)", and