(b)

1. (1) If a person is reported missing to a law enforcement agency and that agency determines that the requirements of subdivision (c) are met, the agency may request the Department of the California Highway Patrol to activate a Silver Alert. If the Department of the California Highway Patrol concurs that the requirements of subdivision (c) are met, it shall activate a Silver Alert within the geographical area requested by the investigating law enforcement agency.
2. (2) Radio, television, and cable and satellite systems are encouraged to, but not required to, cooperate with disseminating the information contained in a Silver Alert.
3. (3) Upon activation of a Silver Alert, the Department of the California Highway Patrol shall assist the investigating law enforcement agency by issuing a be-on-the-lookout alert, an Emergency Digital Information Service message, an electronic flyer, or a changeable message sign in compliance with paragraph (4).

4. (4) Upon activation of a Silver Alert, the Department of the California Highway Patrol may use a changeable message sign if both of the following conditions are met:

   1. (A) A law enforcement agency determines that a vehicle may be involved in the missing person incident.
   2. (B) Specific vehicle identification is available for public dissemination.

(c) A law enforcement agency may request a Silver Alert be activated if that agency determines that all of the following conditions are met in regard to the investigation of the missing person:

1. (1) The missing person is 65 years of age or older, developmentally disabled, or cognitively impaired.
2. (2) The investigating law enforcement agency has utilized all available local resources.
3. (3) The law enforcement agency determines that the person has gone missing under unexplained or suspicious circumstances.
4. (4) The law enforcement agency believes that the person is in danger because of age, health, mental or physical disability, or environment or weather conditions, that the person is in the company of a potentially dangerous person, or that there are other factors indicating that the person may be in peril.
5. (5) There is information available that, if disseminated to the public, could assist in the safe recovery of the missing person.

(d) For purposes of this section, the following definitions have the following meanings:

1. (1) “Developmentally disabled” means affected by a developmental disability, as defined in subdivision (a) of Section 4512 of the Welfare and Institutions Code.
2. (2) “Cognitively impaired” means affected by a cognitive impairment, as defined in Section 14522.4 of the Welfare and Institutions Code.