Senate committee substitute to the 1st edition makes the following changes. Deletes proposed changes to the definition of all-terrain vehicle or ATV in GS 20-4.01 and instead changes the definition of all-terrain vehicle or ATV to a motorized vehicle 50 inches or less in width (was, no specified width) designed to travel on three or more (was, three or four) low-pressure tires, and manufactured for off-highway use (deletes the requirements concerning the seat and handlebars). Excludes from the term golf carts, utility vehicles, and riding lawnmowers. Also amends the definition of utility vehicle as a motor vehicle that is designed for off-road use and used for general maintenance, security, agricultural, or horticultural purposes (was, designed and manufactured for general maintenance, security, recreation, and landscaping purposes, without specifying off-road use). The term excludes all-terrain vehicles or golf carts and riding lawn mowers.

Adds a section amending GS 20-171.16 requiring a passenger on an all-terrain vehicle who is under 18 years old to wear eye protection and a safety helmet.

Changes the effective date of the act from when the act becomes law to December 1, 2013.