Md. Code, Transportation § 11-154

(a) “School vehicle” means, except as provided in subsection (b) of this section, any motor vehicle that:

(1) Is used regularly for the exclusive transportation of children, students, or teachers for educational purposes or in connection with a school activity; and

(2) Is:

(i) A Type I school vehicle, as defined in this subtitle;

(ii) A Type II school vehicle, as defined in this subtitle; or

(iii) A vehicle that:

1. Was originally titled in another state and used to transport children, students, or teachers for educational purposes or in connection with a school activity in that state;

2. Complies with regulations on transporting children enrolled in the federally funded Head Start Program adopted by the United States Department of Health and Human Services; and

3. Is used only for transporting children to and from a Head Start program.

(b) “School vehicle” does not include:

(1) A privately owned vehicle while it is carrying members of its owner’s household and not operated for compensation; or

(2) A vehicle that is registered as a Class M (multipurpose) vehicle under § 13–937 of this article or a Class A (passenger) vehicle under § 13–912 of this article and used to transport children between one or more schools or licensed child care centers or to and from designated areas that are approved by the Administration if:

(i) The vehicle is designed for carrying 15 persons or less, including the driver;

(ii) The children are permitted to embark or exit the vehicle only at a school or child care center or a designated area approved by the Administration;

(iii) The owner has obtained vehicle liability insurance or other security as required by Title 17 of this article; and

(iv) The vehicle is equipped with proper seat belts or safety seats so as to permit each child to be secured in a seat belt or a safety seat as required by §§ 22–412.2 and 22–412.3 of this article.