Maryland Code, Transportation § 22-208

(i) On the front, two clearance lamps, one at each side, and on those manufactured or assembled after June 1, 1971, three identification lamps meeting the specifications of subsection (c) of this section;

(ii) On the rear, two clearance lamps, one at each side, and after June 1, 1970, three identification lamps meeting the specifications of subsection (c) of this section;

(iii) On each side, two side marker lamps, one at or near the front and one at or near the rear; and

(iv) On each side, two reflectors, one at or near the front and one at or near the rear.

(i) On the front, two clearance lamps, one at each side;

(ii) On the rear, two clearance lamps, one at each side, and after June 1, 1971, three identification lamps meeting the specifications of subsection (c) of this section;

(iii) On each side, two side marker lamps, one at or near the front and one at or near the rear; and

(iv) On each side, two reflectors, one at or near the front and one at or near the rear.

(i) On each side, one amber side marker lamp at or near the front of the load;

(ii) One amber reflector at or near the front of the load; and

(iii) On the rearmost support for the load, one combination marker lamp showing amber to the front and red to the rear and side, mounted to indicate maximum width of the pole trailer.