Md. Code, Transportation § 13–411.1

(a) In this section, “registration plate cover” means any tinted, colored, painted, marked, or illuminated object that is designed to:

(1) Obscure or block any of the characters of a vehicle’s registration plate; or

(2) Distort a recorded image of any of the characters of a vehicle’s registration plate recorded by a traffic control signal monitoring system under § 21–202.1 of this article.

(b) A person may not sell or offer for sale a registration plate cover.

(c) (1) A person may not advertise for the purpose of promoting the sale of registration plate covers.

(2) A person may not advertise for or promote the sale of an unlawful registration plate cover by falsely claiming that the registration plate cover is lawful in the State.

(d) A violation of subsection (c)(2) of this section is:

(1) An unfair, abusive, or deceptive trade practice within the meaning of Title 13 of the Commercial Law Article; and

(2) In addition to the penalty under § 27–101 of this article, subject to the enforcement and penalty provisions contained in Title 13 of the Commercial Law Article.