California Code, Health and Safety Code - HSC § 25250.16

(a) No person may recycle used oil without obtaining authorization from the department pursuant to Section 25200 or 25200.5, or unless exempted pursuant to Section 25143.2.

(b) Any person who is authorized to recycle used oil pursuant to Section 25200 or 25200.5 shall assure, to the satisfaction of the department, that halogens removed from used oil in the recycling process are not burned, except at a facility authorized to do so pursuant to Section 25200 or 25200.5.