The President may not accept an agreement described in paragraph (1), (2), (3), (4), (5), (6), (7), (9), (10), or (11) of subsection (c) of this section, unless he determines that each major industrial country (as defined in section
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(d) of this title) is also accepting the agreement. Notwithstanding the preceding sentence, the President may accept such an agreement, if he determines that only one major industrial country is not accepting that agreement and the acceptance of that agreement by that country is not essential to the effective operation of the agreement, and if—
For purposes of this paragraph, the acceptance of an agreement by the European Communities on behalf of its member countries shall also be treated as acceptance of that agreement by each member country, and acceptance of an agreement by all the member countries of the European Communities shall also be treated as acceptance of that agreement by the European Communities.