Please clarify what is meant by industry standard.

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API has assisted EPA in determining industry standard by preparing a list of alternate test methods in use in 1990. Other test methods may also be considered, but there must be concurrence from the auditor that such test methods were acceptable in 1990 and used correctly.(7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (PDF)(333 pp, 18.17 MB, EPA420-R-03-009, July 2003, About PDF)