Maryland Code, State Government § 22-206

(1) interfering with, restraining, or coercing employees in the exercise of their rights under this title;

(2) dominating, interfering with, contributing financial or other support to, or assisting in the formation, existence, or administration of any employee organization;

(3) granting administrative leave to employees to attend employer sponsored or supported meetings or events relating to an election under Subtitle 4 of this title, unless the public employer grants employees at least the same amount of administrative leave to attend labor organization sponsored or supported meetings or employee meetings;

(4) discriminating in hiring, tenure, or any term or condition of employment to encourage or discourage membership in an employee organization;

(5) discharging or discriminating against an employee because of the signing or filing of an affidavit, petition, or complaint, or giving information or testimony in connection with matters under this title;

(6) failing to provide all employee organizations involved in an election the same rights of access as required by the Board through regulation;

(7) engaging in surveillance of union activities;

(8) refusing to bargain in good faith;

(9) failing to meet an established negotiation deadline, unless a written agreement between the public employer and the exclusive representative provides otherwise;

(10) engaging in a lockout; or

(11) spending public money to contract with, using public resources to contract with, or providing assistance to an individual or group for a negative campaign against efforts by employees of a public employer or an employee organization to:

(1) interfering with, restraining, or coercing employees in the exercise of their rights under this title;

(2) causing or attempting to cause a public employer to discriminate in hiring, tenure, or any term or condition of employment to encourage or discourage membership in an employee organization;

(3) engaging in, inducing, or encouraging any person to engage in a strike;

(4) interfering with the statutory duties of the State or a public employer;

(5) refusing to bargain in good faith; or

(6) not fairly representing employees in collective bargaining or in any other matter in which the employee organization has the duty of fair representation.