Maryland Code, Transportation § 22-405.2

(a) A person may not drive on any highway any motor vehicle, trailer, or semitrailer having any metal tire in contact with the roadway.

(b) Except as provided in subsection (c) of this section, a tire on a vehicle driven on a highway may not have on its periphery any block, stud, flange, cleat, or spike or any other protuberance of any material, other than rubber, that projects beyond the tread of the traction surface of the tire, except that:

(c) From November 1 through March 31, owners of vehicles registered in Allegany County, Carroll County, Frederick County, Garrett County, or Washington County are exempt from the prohibition of the use of tires described in subsection (b) of this section.

(d) The State Highway Administration and local authorities in their respective jurisdictions, in their discretion, may issue special permits authorizing the operation on a highway of traction engines or tractors having movable tracks with transverse corrugations on the periphery of the movable tracks or farm tractors or other farm machinery, the operation of which on a highway otherwise would be prohibited under this section.