California Code, Labor Code - LAB § 3600.1

(a) Whenever any firefighter of the state, as defined in Section 19886 of the Government Code, is injured, dies, or is disabled from performing his or her duties as a firefighter by reason of his or her proceeding to or engaging in a fire-suppression or rescue operation, or the protection or preservation of life or property, anywhere in this state, including the jurisdiction in which he or she is employed, but is not at the time acting under the immediate direction of his or her employer, he or she or his or her dependents, as the case may be, shall be accorded by his or her employer all of the same benefits of this division that he, she, or they would have received had that firefighter been acting under the immediate direction of his or her employer.  Any injury, disability, or death incurred under the circumstances described in this section shall be deemed to have arisen out of, and been sustained in, the course of employment for purposes of workers' compensation and all other benefits.

(b) Nothing in this section shall be deemed to do either of the following:

(c) If the provisions of this section are in conflict with the provisions of a memorandum of understanding reached pursuant to Section 3517.5 of the Government Code, the memorandum of understanding shall be controlling without further legislative action, except that if the provisions of a memorandum of understanding require the expenditure of funds, the provisions shall not become effective unless approved by the Legislature in the annual Budget Act.