Documentary credits are subject to a set of international rules called Uniform Customs and Practice for Documentary Credits (UCP), Publication No. 600. The rules are set by the International Chamber of Commerce (ICC) in Paris and are used by banks worldwide.
ISBP
International Standard Banking Practice (ISBP) for the Examination of Documents under Documentary Credits is a checklist of best practice worldwide for checking documents under UCP.
ISP98
Standby Letters of Credit are covered by the same rules as letters of credit, UCP600 or ISP98 which deal specifically with this type of letter of credit.