216.1(1)No person shall alter an industrial lift truck in such a way as to render ineffective a safety device installed on the truck, except where the alteration has been certified in writing by the manufacturer of the device or an engineer as affording protection equal to or greater than the protection afforded by the original device.

216.1(2)An operator shall not use, and an employer shall not permit to be used, an industrial lift truck if the truck has been altered so as to render ineffective a safety device installed on the truck, unless the alteration has been certified in writing by the manufacturer of the device or an engineer as affording protection equal to or greater than the protection provided by the original device.