(a) The commission by rule shall authorize memorial markers honoring peace officers killed in the line of duty who are not Department of Public Safety troopers. The program established under this section shall be identical to the commission's existing program for memorial markers for honoring Department of Public Safety troopers.
(b) As used in this section, "peace officer" means a person who was:
(1) a law enforcement officer or peace officer for this state or a political subdivision of this state under Article 2A.001, Code of Criminal Procedure, or other law; or
(2) a federal law enforcement officer or special agent performing duties in this state, including those officers under Article 2A.002, Code of Criminal Procedure.