There are also declarations that may contain several material unilateral acts, as is the case of the declaration by Colombia, formulated in a note of 22 November 1952, in which we can see a recognition, a waiver and a promise.
23． 还有一些声明也许包含着若干实质性的单方面行为，譬如哥伦比亚在1952年11月22日照会中所作出的声明。