Any petitioner who submits or completes a petition under Part IV of this subtitle shall have the immunity from liability described under § 5-624(b) of the Courts and Judicial Proceedings Article. Any peace officer who acts as a custodian of an emergency evaluee shall have the immunity from liability described under § 5-624(c) of the Courts and Judicial Proceedings Article. An emergency facility that acts in compliance with the provisions of Part IV of this subtitle shall have the immunity from liability described under § 5-624(d) of the Courts and Judicial Proceedings Article. An agent or employee of an emergency facility who acts in compliance with the provisions of Part IV of this subtitle shall have the immunity from liability described under § 5-624(e) of the Courts and Judicial Proceedings Article.