They don't have any legal document that can certify they have the necessary expertise.

他们没有任何法律文件能证明他们具备必要的专门技术。

Panels for disputes regarding sectoral matters shall have the necessary expertise relevant to the specific services sectors which the dispute concerns.

关于部门问题的争端专家组应具有与争端所涉具体服务部门有关的必要的专门知识。

Panels for disputes on prudential issues and other financial matters shall have the necessary expertise relevant to the specific financial service under dispute.

关于审慎措施和其他金融事项争端的专家组应具备与争议中的具体金融服务有关的必要的专门知识。