电子签名只在法律规定的范围之内，具有法律效力。
The electronic signature has the legal effect only in the field of application that is stipulated by law.
此漏洞的补充，一是对《合同法》第51条做出一种相对合理的解释，二是为《合同法》第51条设定一个合理的适用范围，确定其法律效力。
The supplement of the leak is designed to provide relative reasonable explanation to Item 51 and also restrict a reasonable applied range in order to confirm its legal efficiency.
本文按照法规的效力范围划分出法律原则体系的层次，进而作出分析。
The article identifies the hierarchy of the principle system according to the laws's scope of effectiveness before analyzing it.
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