(a) The sulfur standard for gasoline at any downstream location shall be determined in accordance with the provisions of this section. A downstream location is any point in the gasoline distribution system downstream from refineries and import facilities, including, but not limited to, facilities of any of the following parties:
(1) Distributors.
(2) Carriers.
(3) Oxygenate blenders.
(4) Retailers.
(5) Wholesale purchaser-consumers.
(b) Except as otherwise provided in this subpart O, the sulfur content of gasoline at any downstream location shall not exceed 95 ppm, on a per-gallon basis, beginning January 1, 2017.