Whenever possible the PTD's should accompany the shipment of gasoline. However, in circumstances like pipeline transfers where this would be impossible, the PTD's do not have to physically accompany the shipment.

The regulations (§ 80.77 and § 80.106) require that on each occasion when any person transfers custody or title of any reformulated gasoline or RBOB or conventional gasoline, the transferor shall provide the transferee the appropriate PTD's. It does not specify the method required for the transferor to provide this information.(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)