3. A State that has made a declaration pursuant to paragraph 1 of this article may establish rules pursuant to which contracts of assignment concluded before the declaration takes effect become subject to those rules within a reasonable time.
3. 依照本条第1款作出声明的一国可确立一些规则，在声明生效之前订立的转让合同应根据这些规则在一段合理时间内受其约束。