CAA section 211(k)(6)(B) states that, "[u]pon the application of the Governor of a State in the ozone transport region established by section 184(a), the Administrator . . . shall apply the prohibition" against the sale of conventional gasoline in RFG covered areas "to any area in the state (other than an area classified as a marginal, moderate, serious or severe ozone nonattainment area. CAA section 211(k)(6) provides the EPA some discretion to establish and extend the commencement date for this prohibition, including allowing extensions based on a finding by EPA that there is an insufficient capacity to supply reformulated gasoline (RFG).However, the EPA does not have discretion to deny a Governor's request. The EPA is acting on a request made by the Governor of the State of Maine to extend the CAA prohibition against the sale of conventional gasoline in RFG areas to the southern Maine counties of York, Cumberland, Sagadahoc, Androscoggin, Kennebec, Knox, and Lincoln which are part of the ozone transport region. The EPA proposes a commencement date for this prohibition of May 1, 2015 for all entities in the affected opt-in area other than retailers and wholesale purchaser-consumers (i.e., refiners, importers, and distributors), and June 1, 2015 for all retailers and wholesale purchaser-consumers. If finalized as proposed, the southern Maine counties of York, Cumberland, Sagadahoc, Androscoggin, Kennebec, Knox, and Lincoln would be a covered area in the federal RFG program on June 1, 2015.