Alternative Fuel Stations: Public Accessibility (2) under 42 U.S.C. § 13213(a) says that refueling stations providing alternative fuels to agencies are to be accessible to the public when feasible.
Federal agencies shall, to the maximum extent practicable, arrange for the fueling of alternative fueled vehicles acquired under section 13212 of this title at commercial fueling facilities that offer alternative fuels for sale to the public. If publicly available fueling facilities are not convenient or accessible to the location of Federal alternative fueled vehicles purchased under section 13212 of this title, Federal agencies are authorized to enter into commercial arrangements for the purposes of fueling Federal alternative fueled vehicles, including, as appropriate, purchase, lease, contract, construction, or other arrangements in which the Federal Government is a participant.