Maryland Code, Business Occupations and Professions § 1-301

(1) a professional engineer who is licensed under Title 14 of this article;

(2) a professional land surveyor who is licensed under Title 15 of this article; or

(3) an authorized representative of the professional engineer or the professional land surveyor who is executing a survey.

(1) by or under the direction of the National Geodetic Survey;

(2) as a part of the Maryland coordinate system; or

(3) by or under the direction of any other organization whose survey stations have been established by or in accordance with the requirements of the State agency authorized to administer the Maryland coordinate system.