Md. Code, Pub. Safety § 9-401

(a) In this subtitle the following words have the meanings indicated. (b) (1) “High–rise building” means a building for human occupancy that is: (i) four or more stories above grade level; or (ii) over 45 feet in height. (2) “High–rise building” does not include: (i) a structure or building used exclusively for open air parking; or (ii) a building used exclusively for agricultural purposes. (c) “Local fire department” means a career or volunteer fire department. (d) “Mobility impaired” means unable to carry objects or to move or travel without the use of an assistive device or service animal. (e) “Public way” means a paved thoroughfare over 21 feet in width that: (1) is located on privately owned and privately maintained property but is designated for public use; or (2) is publicly owned and publicly maintained.