2. The provisions of this Convention apply further to electronic communications in connection with the formation or performance of a contract to which another international convention, treaty or agreement not specifically referred to in paragraph 1 of this article, and to which a Contracting State to this Convention is or may become a Contracting State, applies, unless the State has declared, in accordance with article 21, that it will not be bound by this paragraph.
二、本公约的规定还适用于与订立或履行本公约一缔约国已加入或可能加入但未在本条第一款中具体提及的另一国际公约、条约或协定所适用的合同有关的电子通信，除非该国已根据第二十一条声明其将不受本款的约束。