CFR › Title 40 › Part 1066 › §1066.92040 CFR §1066.920Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkEnclosures for evaporative and refueling emissions must meet the calibration specifications described in 40 CFR 86.116-94 and 86.117-96.