40 CFR §79.7
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
When the Administrator requires for test purposes a fuel or additive which is not readily available in the open market, he may request the manufacturer of such fuel or additive to furnish a sample in a reasonable quantity. The fuel or additive manufacturer shall comply with such request within 30 days.