California Code, Public Resources Code - PRC § 4630

(a) “Innovative forest products” means products made using small-diameter woody materials, brush, and dead trees removed from fire hazard areas identified by the department and that are milled and manufactured in California to the maximum extent possible.

(b) “Mass timber” means prefabricated wood products consisting of not less than three layers of solid-sawn lumber or structural composite lumber in which adjacent layers are cross-oriented and bonded with structural adhesives, dowels, or nails to form a solid wood element and that are milled and manufactured in California to the maximum extent possible.