Except as otherwise provided in this subchapter, in section 1351 of this title, or in section 401(a) of the Tariff Classification Act of 1962, any duty or other import restriction or duty-free treatment proclaimed in carrying out any trade agreement under this subchapter or section 1351 of this title shall apply to products of all foreign countries, whether imported directly or indirectly.

Nothing contained in this chapter shall be construed to affect in any way the provisions of section 624 of title 7, or to apply to any import restriction heretofore or hereafter imposed under such section.

All provisions of law (other than this chapter and the Trade Agreements Extension Act of 1951) in effect after June 30, 1962, referring to section 350 of the Tariff Act of 1930, to that section as amended, to the Act entitled “An Act to amend the Tariff Act of 1930”, approved June 12, 1934, to that Act as amended, or to agreements entered into, or proclamations issued, under any of such provisions, shall be construed, unless clearly precluded by the context, to refer also to this chapter, or to agreements entered into or proclamations issued, pursuant to this chapter.