Md. Code, Public Utilities § 18–213

(a) An employee organization may not:

(1) interfere with, coerce, or restrain an employee in the exercise by the employee of any right under this subtitle;

(2) cause or attempt to cause the Commission to discriminate against an employee in the exercise by the employee of any right under this subtitle;

(3) coerce, discipline, fine, or attempt to coerce a member of an employee organization as punishment or reprisal;

(4) coerce, discipline, fine, or attempt to coerce a member of an employee organization for the purpose of impeding the member’s work performance;

(5) refuse to negotiate in good faith with the Commission as required under § 18–207 of this subtitle; or

(6) fail or refuse to cooperate in impasse procedures and impasse decisions as required under § 18–208 of this subtitle.

(b) Only an eligible employee may file an unfair labor charge against an employee organization for a violation of subsection (a)(3) or (4) of this section.