Md. Code, Business Regulation § 10–202

(a) The Comptroller may adopt regulations necessary to administer and enforce this title.

(b) The Comptroller shall adopt regulations to:

(1) set minimum specifications for motor fuel marketed in the State consistent with the general practices of other states and the petroleum industry;

(2) specify the information to be included on each loading ticket or manifest; and

(3) specify the form of identification markers for vehicles and the method of annual validation of the markers.