For parties upstream of the retail outlet or wholesale purchaser-consumer, the PTDs required under the regulation may use product codes, except that the sulfur content standard must appear in numeric form (15, 500 or >500).

For PTDs to retail outlets or wholesale purchaser-consumers, the exact language must be used (unless alternative language has been approved by EPA).

Question and Answer was originally posted at Questions and Answers on the Clean Diesel Fuel Rules (PDF)(135 pp, 888 K, EPA420-B-06-010, July 2006, About PDF)