PRC §48620.2: (a) “Rerefined oil” means a lubricant base stock or oil base that has been derived from used oil and meets all the following criteria: (1) Processed using a series of mechanical or chemical methods, o

(a) “Rerefined oil” means a lubricant base stock or oil base that has been derived from used oil and meets all the following criteria: (1) Processed using a series of mechanical or chemical methods, or both, including at a minimum, but not limited to, vacuum distillation, followed by solvent refining or hydrotreating. (2) Capable of meeting the Physical and Compositional Properties, in addition to the Contaminants and Toxicological Properties, as defined under the American Society for Testing and Materials (ASTM) D6074-99 standard. (3) Processed into a material that has a performance quality level suitable for use in a finished lubricant. (b) A producer of a rerefined base stock shall provide a purchaser of that base stock with information that certifies that the rerefined base stock is rerefined oil, as that term is defined by subdivision (a). Any rerefined base stock that does not comply with subdivision (a) shall not be sold as rerefined oil and is subject to all applicable hazard, personal protection, and risk communication requirements until subsequent testing demonstrates compliance with subdivision (a).