Both. If an importer chooses to register individual import facilities it must register them 90 days prior to shipping into them. However, an importer is only required to register its activities in each PADD (still 90 days in advance) as per § 80.76(c)(3) in the amended regulations.(7/1/94)

This question and answer was originally 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)