4. Any State may declare that it will not apply the provisions of this Convention to the use of electronic communications in connection with the formation or performance of a contract to which any international convention, treaty or agreement specified in that State's declaration, to which the State is or may become a Contracting State, applies, including any of the conventions referred to in paragraph 1 of this article, even if such State has not excluded the application of paragraph 2 of this article by a declaration made in accordance with article 21.
四、任何国家均可声明，对于与订立或履行该国已加入或可能加入的而且在该国的声明中指明的任何国际公约、条约或协定，包括本条第一款中提及的任何公约所适用的合同有关的电子通信的使用，本国将不适用本公约的规定，即使该国尚未通过根据第二十一条作出声明的方式排除本条第二款的适用亦如此。