委员会的成员增加至最多 21 个，并邀请中国成为其成员。2 出席第五十四届会议的还有联合国环境规划署（环境规划署）、国际原子能机构（原子能机构）、国际辐射防护委员会（辐防委员会）和国际辐射单位和测量委员会的观察员。
2 The fifty-fourth session was also attended by observers from the United Nations Environment Programme (UNEP), the International Atomic Energy Agency (IAEA), the International Commission on Radiological Protection (ICRP), and the International Commission on Radiation Units and Measurements (ICRU).