The Commissioner and State Chemist hereby adopt by reference, including subsequent amendments and editions, ASTM D 4814, "Standard Specification for Automotive Spark-Ignition Engine Fuel" as standard specification for alcohol blends with the following modifications:
1. A vapor pressure tolerance not exceeding one pound per square inch for ethanol blends of up to 10 percent;2. Vapor pressure seasonal specifications as listed in this Subparagraph may be extended for a maximum period of 15 days to allow for the disbursement of old stocks. However, new stocks of a higher volatility classification shall not be offered for retail sale prior to the effective date of the higher volatility classification;3. Applications for temporary exceptions to vapor pressure specifications as provided in this Subparagraph may be made to the Commissioner and State Chemist. Said applications shall contain evidence satisfactory to the Commissioner and State Chemist that outlets marketing gasoline in Mississippi cannot feasibly be supplied from bulk terminals furnishing specified volatility level gasoline or that customary sources of supply have been temporarily interrupted by product shortage and alternate sources furnishing specified volatility level gasoline are not available. Such temporary exceptions granted shall apply only until the next meeting of the Commissioner and State Chemist at which time the Commissioner and State Chemist shall establish the duration of the exception;4. The minimum temperature at 50 percent evaporated shall be 150 degrees F (66 degrees C) as determined by ASTM Test Method D 86 for ethanol blends of up to 10 percent;5. The vapor/liquid ratio specification shall be waived for ethanol blends of up to 10 percent;6. All blends shall be blended according to the EPA "Substantially Similar" rule or an EPA waiver for unleaded fuel;7. Water tolerance shall be such that no phase separation occurs when subjected to a temperature equal to the temperatures specified in the table for "Maximum Temperature for Phase Separation, C," ASTM D 4814.2 Miss. Code. R. 1-4-08-108.02