Continually , the paper analyzes the background and significance of the drawing up of the uniform customs and practice for documentary credit , and it also analyzed its legislation validity , and the main characters and new achievements of ucp500 comparing with ucp400 , additionally it analyzed the principal characters and functions of isp98 and the newly published " ucp supplement for electronic presentation " ( eucp ) , and the last part of this chapter try to calculate the develop trends of ucp 本文接着分析了《跟单信用证统一惯例》产生和发展的历史背景、意义及其法律效力，对比《 ucp400 》分析了《 ucp500 》的主要特征及其新成果，并简要分析了isp98和最近制订的“信用证电子交单增补” （ eucp ）的特点和作用，此外还试着对《统一惯例》的发展趋势做了估计。
The uniform customs and practice for documentary credits , 2007 revision , icc publication no . 600 ( “ ucp ” ) are rules that apply to any documentary credit ( " credit " ) ( including , to the extent to which they may be applicable , any standby letter of credit ) when the text of the credit expressly indicates that it is subject to these rules 跟单信用证统一惯例， 2007年修订本，国际商会第600号出版物，适用于所有在正文中标明按本惯例办理的跟单信用证（包括本惯例适用范围内的备用信用证） 。
To normalize further the practice of standby letter of credit globally , the international chamber of commerce , on the basis of uniform customs and practice for documentary credits and united nations convention on independent guarantees and standby letter of credit , promulgated officially international standby practices on april sixth , 1998 to stipulate uniformly the legal systems and operation procedures concerning standby letter of credit 为进一步在全球范围规范备用信用证的做法，国际商会在《跟单信用证统一惯例》和《联合国独立担保和备用信用证公约》的基础上，于1998年4月6日正式颁布了《备用证国际惯例》 ，对备用信用证的法律制度和运作程序进行了统一规定。
