(a) In the counties listed in §114.309 of this title (relating to Affected Counties), no person shall sell, offer for sale, supply, offer for supply, dispense, transfer, allow the transfer, place, store, or hold in any stationary tank, reservoir, or other container any gasoline with a Reid vapor pressure greater than 7.8 pounds per square inch, on a per gallon basis, which may ultimately be used to power a gasoline engine in the affected counties according to the schedule in subsection (b) of this section.(b) Beginning May 1, 2000, all adjustments in the operation of affected facilities and all transfers or alterations of gasoline not meeting the requirements of this section must be completed as necessary to conform with the provisions of subsection (a) of this section during the following periods of each calendar year:(1) June 1 through October 1 of each year for gasoline dispensing facilities; and(2) May 1 through October 1 of each year for all other affected facilities.