Md. Code, State Finance and Procurement § 2–108

(a) A unit of State government may not knowingly use public funds to influence the decisions of State employees to:

(1) support or oppose an employee organization that represents or seeks to represent the employees of the unit of State government; or

(2) become a member of an employee organization.

(b) This section does not apply to an activity performed or to an expense incurred in connection with:

(1) addressing a grievance or negotiating or administering a collective bargaining agreement;

(2) allowing an employee organization or a representative of an employee organization access to and use of State facilities or properties;

(3) performing an activity required by federal or State law or a collective bargaining agreement;

(4) negotiating, entering into, or carrying out a voluntary recognition agreement with an employee organization; or

(5) paying wages to a represented employee while the employee is performing duties if the payment is permitted under a collective bargaining agreement.