278. Protective structures of existing self-propelled vehicles: The following self-propelled vehicles manufactured before 2 August 2001 shall be provided with a roll-over protective structure which meets a standard from the Society of Automotive Engineers (SAE) standardization organization or a standard providing equivalent safety:(1) power rams, and tracked or wheeled loaders and hauling machines;
(2) graders;
(3) tractor scrapers;
(4) agricultural and industrial tractors of more than 15 kW.
The design, manufacture or installation of a protective structure is deemed to be in compliance with the standard if it has been certified, signed and sealed by an engineer.
This section does not apply to graders or loaders used for snow removal if these vehicles only circulate in places where there is no risk of overturning. Nor does it apply to a low profile agricultural tractor when used in an orchard.