Md. Code, Business Regulation § 1-207

(a) By August 31 of each year, the Department shall provide to the Department of Assessments and Taxation a list of the following persons issued licenses during the previous fiscal year, to assist the Department of Assessments and Taxation in identifying new businesses within the State:

(1) managers and promotors, licensed under Title 4 of this article;

(2) collection agencies, licensed under Title 7 of this article;

(3) home improvement contractors and subcontractors, licensed under Title 8 of this article;

(4) employment agencies, licensed under Title 9 of this article;

(5) heating, ventilation, air-conditioning, and refrigeration contractors with master licenses and master restricted licenses, licensed under Title 9A of this article;

(6) owners and trainers, licensed under Title 11 of this article; and

(7) secondhand precious metal object dealers and pawnbrokers, licensed under Title 12 of this article.

(b) The list provided under this section shall:

(1) be provided free of charge; and

(2) include, for each person on the list:

(i) the name and mailing address of the person; and

(ii) the federal tax identification number of the person or, if the person does not have a federal tax identification number, the Social Security number of the person.