Maryland Criminal Law Section 2-506
§ 2-506.
  (a)   A person may not cause the death of another as a result of the person's negligently driving, operating, or controlling a motor vehicle or vessel while the person is impaired by a controlled dangerous substance, as defined in § 5-101 of this article.
  (b)   A violation of this section is homicide by motor vehicle or vessel while impaired by a controlled dangerous substance.
  (c)   A person who violates this section is guilty of a felony and on conviction is subject to imprisonment not exceeding 3 years or a fine not exceeding $5,000 or both.
  (d)   This section does not apply to a person who is entitled to use the controlled dangerous substance under the laws of this State.