Is there a required format for the wording of the certification for RFG? If not, is there a re ommended or suggested format for certification in the PTD's, for downstream parties?

No, to both questions. Section 80.106(a)(1)(vii) does specify certain language for conventional gasoline. (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)