(a) The following counties may establish, until January 1, 2032, a pilot program to authorize a district attorney to file a petition for a gun violence restraining order issued pursuant to Chapter 3 (commencing with Section 18150) or Chapter 4 (commencing with Section 18170) of this division:
(1) County of Alameda.
(2) County of El Dorado.
(3) County of Santa Clara.
(4) County of Ventura.
(b) (1) As used in Section 18109, 18150, 18170, or 18190, “law enforcement officer” includes any district attorney, assistant district attorney, or deputy district attorney for a county identified in subdivision (a) that has established a pilot program pursuant to this section.
(2) As used in Section 18109, “law enforcement agency” includes the district attorney’s office for a county identified in subdivision (a) that has established a pilot program pursuant to this section.