You only need to register your ATV if you want it deemed Dzstreet legal,dz or approved for use on streets and highways. Your vehicle has to be titled and needs to meet on-highway equipment requirements. You can get more information on registering your ATV on the Arizona Department of Transportation website. All Arizona ATV drivers need to register for an OHV decal. The OHV Decal is a sticker that must be purchased for an annual fee of $25. The decal should be clearly displayed in the upper left corner of your license plate. The decal is valid for one year from purchase. It is your responsibility to renew and display a valid OHD Decal on your ATV. You can purchase one through MVD, MVD third-party providers or online.
Check out these Cornville, AZ ATV/OHV resources: