An employer may not: violate any provision of this subtitle; hinder, delay, or otherwise interfere with the Commissioner or an authorized representative of the Commissioner in the enforcement of this subtitle; or discharge or otherwise discriminate against an employee because the employee: has requested or taken parental leave authorized under this subtitle; makes a complaint to the employer, the Secretary, or another person; brings an action under this subtitle or a proceeding that relates to the subject of this subtitle or causes the action or proceeding to be brought; or has testified or will testify in an action under this subtitle or a proceeding that relates to the subject of this subtitle. The Commissioner may bring an action for injunctive relief and damages against a person who violates subsection (a)(1) or (3) of this section.