最惠国待遇不是一条习惯国际法规则,其适用依赖于缔约各方的合意。在BIT规定MFN待遇的适用范围与例外不够明确时,ICSID仲裁庭对于MFN条款是否能够适用于争端解决程序尚未取得一致意见,存在着有限适用、完全适用、基本不适用、完全不适用四种情况。中国目前的BIT实践不能排除将来仲裁庭把最惠国条款适用于争端解决的可能性,应就此采取相应对策。 Most-favored-nation treatment is not a rule of customary international law and its application depends on the agreement of the parties. When the scope and exceptions to the MFN treatment provided by the BIT are not clear enough, the ICSID arbitral tribunal has not yet reached a consensus on whether the MFN provisions can be applied to the dispute settlement procedure, with limited application, fully applicable, basically not applicable and totally not applicable . The current practice of BIT in China can not exclude the possibility that the arbitration tribunal will apply the MFN clause to dispute settlement in the future and corresponding measures should be taken accordingly.