Solely for the purpose of calculating the Spill Impact Formula, the coastal counties bordering the Gulf of Mexico within each Gulf Coast State are:

(a) The Alabama Coastal Counties, consisting of Baldwin and Mobile counties;

(b) The Florida Coastal Counties, consisting of Bay, Charlotte, Citrus, Collier, Dixie, Escambia, Franklin, Gulf, Hernando, Hillsborough, Jefferson, Lee, Levy, Manatee, Monroe, Okaloosa, Pasco, Pinellas, Santa Rosa, Sarasota, Taylor, Wakulla, and Walton counties;

(c) The Louisiana Coastal Parishes, consisting of Cameron, Iberia, Jefferson, Lafourche, Orleans, Plaquemines, St. Bernard, St. Mary, St. Tammany, Terrebonne, and Vermilion parishes;

(d) The Mississippi Coastal Counties, consisting of Hancock, Harrison, and Jackson counties; and

(e) The Texas Coastal Counties, consisting of Aransas, Brazoria, Calhoun, Cameron, Chambers, Galveston, Jefferson, Kennedy, Kleberg, Matagorda, Nueces, and Willacy counties.