The BWPP subsequently informed the ISU on 21 November that the Cook Islands had sent its instrument of accession to London via the United Kingdom High Commission in Wellington, New Zealand.
随后，生物武器防备项目于11月21日告知执行支助股，库克群岛已通过联合王国驻新西兰惠灵顿高级专员公署，将加入书送交伦敦。