Md. Code, Labor and Employment § 3–1310

(a) An employee may not in bad faith:

(1) file a complaint with the Commissioner alleging a violation of this subtitle;

(2) bring an action under § 3–1308 of this subtitle; or

(3) testify in an action under § 3–1308 of this subtitle.

(b) An employee who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $1,000.