Chapter 13.40 OFF-ROAD OPERATIONS OF MOTOR VEHICLES This chapter is included in your selections. Sections: 13.40.010 Definitions. 13.40.020 Off-Road Vehicle Operation. 13.40.030 Special Stops Required. 13.40.040 Speed Limits. 13.40.050 Helmets. 13.40.055 Requirement That Minors Wear Certified, Protective Helmets. 13.40.060 Operator. 13.40.070 Parental and Guardian Responsibility. 13.40.080 Penalty.