Md. Code, Family Law § 5–801

(a) A person who is charged with the care of a child under the age of 8 years may not allow the child to be locked or confined in a dwelling, building, enclosure, or motor vehicle while the person charged is absent and the dwelling, building, enclosure, or motor vehicle is out of the sight of the person charged unless the person charged provides a reliable person at least 13 years old to remain with the child to protect the child.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $500 or imprisonment not exceeding 30 days, or both.