Maryland Code, Transportation § 4-404

(a) The Authority shall construct any gasoline service facilities that it finds to be needed on the John F. Kennedy Memorial Highway.

(b) The Authority may require a gasoline service facility located on the John F. Kennedy Memorial Highway to sell a blend of fuel that is at least 5% biodiesel fuel or other biofuel approved by the U.S. Environmental Protection Agency as a fuel or fuel additive or approved under the EPA Renewable Fuels Standard 2 Program.

(c) The Authority shall regulate the prices of fuel products sold on the highway to the extent necessary to achieve reasonable costs to patrons.

(d) The lessee of any service station established under this section shall accept in payment for products sold and services rendered those credit cards that the Authority directs.