California Code, Health and Safety Code - HSC § 41860

The state board shall adopt and publish a list of orchard and citrus grove heaters which it finds produce no more than one gram per minute of unconsumed solid carbonaceous material. No new orchard or citrus grove heater produced or manufactured shall be sold for use against frost damage unless it has been approved by the state board.

No person shall use any orchard or citrus grove heater after January 1, 1975, unless it has been approved by the state board or does not produce more than one gram per minute of unconsumed solid carbonaceous material.

In addition to the penalties specified in Section 42400, the cost of putting out the fire caused by a violation of this section may be imposed on any person who violates this section.