http://www.forestriverforums.com/forums/f34/automated-safety-hitch-50970.html#post499210 said:
Included with each unit sold is a notarized letter indicating the regulatory compliance in 9 continents and regions stating that the Automated Safety Hitch System is classified as a lift/drop axle, not as a trailer. Therefore, registration with state and county motor vehicle departments is not required. The letter also states that the additional seven to nine feet should not be added because “the length of devices determined to be necessary for safe and efficient operation should be excluded.” Several states have laws that exempt the lift/drop axle from the length limitation. Jamieson said that none of his customers have reported being ticketed for length violations and that was confirmed by the customers I interviewed for this report. Customers surveyed also revealed that the Safety Hitch has been used in nearly every state and in Canada without any problem. There are additional links below covering state RV length laws. If unsure, contact your local state agency.