States Parties are encouraged to conclude, when necessary, bilateral or multilateral agreements or arrangements for using such special investigative techniques at the international level within the framework of cooperation, in order to investigate crimes covered by this Convention.
2. 为侦查本公约范围内的犯罪，鼓励缔约国在必要时为在国际一级合作时 使用这类秘密侦查手段而缔结双边或多边协定或安排。