Cal. Vehicle Code § 35555

(a) During the period commencing September 15 of each year and ending March 15 of the following year, the weight limitations of Section 35551 do not apply to any cotton module mover or any truck tractor pulling a semitrailer that is a cotton module mover, when operated as follows: (1) Laterally across a state highway at grade of the state highway. (2) Upon any county highway within the Counties of Butte, Colusa, Fresno, Glenn, Imperial, Kern, Kings, Madera, Merced, Riverside, Sacramento, San Benito, San Bernardino, San Joaquin, Stanislaus, Sutter, Tehama, Tulare, Yolo, and Yuba, except as prohibited or limited on county highways or portions thereof by resolution of the county board of supervisors having jurisdiction. (b) A cotton module mover may be operated upon a state highway within the counties and during the period set forth in subdivision (a) if all of the following are met: (1) The operator is in possession of a driver’s license of the class required for operation of the mover. (2) The mover is operated in compliance with Sections 24002 and 24012; Article 1 (commencing with Section 24250) of, Article 3 (commencing with Section 24600) of, Article 4 (commencing with Section 24800) of, Article 5 (commencing with Section 24950) of, Article 6 (commencing with 25100) of, Article 9 (commencing with 25350) of, Article 11 (commencing with 25450) of, Chapter 2 of Division 12; and Article 2 (commencing with 26450) and Article 3 (commencing with 26502) of Chapter 3 of Division 12. (3) The mover does not exceed the maximum allowable gross axle weight for tandem axles set forth in Section 35551 by more than 6,000 pounds. (4) The operator of a mover that exceeds the maximum allowable gross axle weight for tandem axle vehicles as set forth in Section 35551 shall possess a commercial driver’s license as defined in subdivision (a) of Section 15210. (c) This section does not apply to those highways designated by the United States Department of Transportation as national network routes.