Section 35251 - Boom or mast(a) A boom or mast which is designed to be raised and lowered by hydraulic mechanisms and which is a constituent part of or an attachment to a vehicle or machine, shall be securely chained or otherwise restrained to ensure compliance with Section 35250 while the vehicle or machine is being transported as a load or driven upon any highway.(b) Subdivision (a) does not apply when the configuration and design of the hydraulic boom effectively restrain the movement of the boom during transit.Amended by Stats. 1994, Ch. 704, Sec. 21. Effective January 1, 1995.