California Code, Public Resources Code - PRC § 4629.4

(a) On or before October 1, 2012, the board shall adopt a regulation that interprets and makes specific the lumber products and engineered wood products that the board determines shall be subject to the lumber products assessment imposed pursuant to Section 4629.5.  The board shall annually update the regulation.  The lumber products identified in the annually updated regulation that is adopted shall become subject to the assessment imposed pursuant to Section 4629.5 on the first day of the calender   1 quarter commencing more than 60 days after adoption of the updated regulation.

(b) The board shall adopt any regulations or emergency regulations necessary to implement the provisions of this article in accordance with the rulemaking provisions of the Administrative Procedure Act (Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of title 2 of the Government Code).  The board may readopt any emergency regulation authorized by this section that is the same as or substantially equivalent to an emergency regulation previously adopted under this section.  The initial adoption of emergency regulations and the one readoption of emergency regulations authorized by this subdivision shall be deemed an emergency and necessary for the immediate preservation of the public peace, health and safety, or general welfare.  The initial emergency regulation and the one readoption of an emergency regulation authorized by this section shall be exempt from review by the Office of Administrative Law.  The initial emergency regulation and the one readoption of an emergency regulations   2 authorized by this section shall be submitted to the Office of Administrative Law for filing with the Secretary of State and each shall remain in effect for no more than 180 days, by which time final regulations may be adopted.  The lumber products and engineered wood products identified in the regulation adopted shall become subject to the assessment imposed pursuant to Section 4629.5, commencing January 1, 2013.