Maryland Code section 21-902

Maryland Code section 21-902-903

§21–902.

(a) (1) A person may not drive or attempt to drive any vehicle while under the influence of alcohol.
(2) A person may not drive or attempt to drive any vehicle while the person is under the influence of alcohol per se.
(3) A person may not violate paragraph (1) or (2) of this subsection while transporting a minor.
(b) (1) A person may not drive or attempt to drive any vehicle while impaired by alcohol.
(2) A person may not violate paragraph (1) of this subsection while transporting a minor.
(c) (1) A person may not drive or attempt to drive any vehicle while he is so far impaired by any drug, any combination of drugs, or a combination of one or more drugs and alcohol that he cannot drive a vehicle safely.
(2) It is not a defense to any charge of violating this subsection that the person charged is or was entitled under the laws of this State to use the drug, combination of drugs, or combination of one or more drugs and alcohol, unless the person was unaware that the drug or combination would make the person incapable of safely driving a vehicle.
(3) A person may not violate paragraph (1) of this subsection while transporting a minor.
(d) (1) A person may not drive or attempt to drive any vehicle while the person is impaired by any controlled dangerous substance, as that term is defined in § 5-101 of the Criminal Law Article, if the person is not entitled to use the controlled dangerous substance under the laws of this State.
(2) A person may not violate paragraph (1) of this subsection while transporting a minor.
(e) For purposes of the application of subsequent offender penalties under § 27-101 of this article, a conviction for a crime committed in another state or federal jurisdiction that, if committed in this State, would constitute a violation of subsection (a), (b), (c), or (d) of this section shall be considered a violation of subsection (a), (b), (c), or (d) of this section.

§21–902.1.
(a) In this section, “arrestee” means a person who has been arrested for a violation of § 21-902 of this subtitle or Title 2, Subtitle 5 or § 3-211 of the Criminal Law Article.
(b) An arrestee may not drive a motor vehicle within 12 hours after the arrestee’s arrest for a violation of § 21-902 of this subtitle or Title 2, Subtitle 5 or § 3-211 of the Criminal Law Article.

§21–903.
(a) (1) In this section the following words have the meanings indicated.
(2) “Alcoholic beverage” means a spirituous, vinous, malt, or fermented liquor, liquid, or compound that contains at least 0.5% alcohol by volume and is fit for beverage purposes.
(3) (i) “Passenger area” means an area that:
1. Is designed to seat the driver and any passenger of a motor vehicle while the motor vehicle is in operation; or
2. Is readily accessible to the driver or a passenger of a motor vehicle while in their seating positions.
(ii) “Passenger area” does not include:
1. A locked glove compartment;
2. The trunk of a motor vehicle; or
3. If a motor vehicle is not equipped with a trunk, the area behind the rearmost upright seat or an area that is not normally occupied by the driver or a passenger of the motor vehicle.
(b) This section applies to a motor vehicle that is driven, stopped, standing, or otherwise located on a highway.
(c) A driver of a motor vehicle may not consume an alcoholic beverage in a passenger area of a motor vehicle on a highway.
(d) Notwithstanding Article 2B, Title 19 of the Code or any other provision of law, the prohibition contained in this section applies throughout the State.