Md. Code Ann., Envir. § 15-522

Whenever a corporation or limited liability company violates any rule or regulation promulgated under § 15-503 of this subtitle, any permit issued pursuant to this subtitle, or fails to correct a violation within the time specified by a notice or order issued under § 15-508(c) or (e) of this subtitle, any officer, director or agent of the corporation or limited liability company who willfully and knowingly authorized, ordered or carried out the violation or failure shall be subject to the penalty provisions of § 15-520(b) and § 15-521(b) and (c) of this subtitle.