Yes it is. The only requirement is that it has a valid Connecticut ATV registration. If you are a legal resident of Vermont, New York or Pennsylvania and have the ATV registered in one of those states, we have reciprocity with them and you may operate under their registration. Note - this doesn't apply if you are a CT resident. The law is specific about that. CT residents must have their ATV/snowmobile registered in CT. Before you pull out the pitchforks and torches...not my call, it's what's in the statute.

Sec. 14-380. Operation prohibited without valid registration. Exceptions. On or after October 1, 1971, no person shall operate and no owner shall permit the operation of any snowmobile or all-terrain vehicle unless the owner holds a valid, effective registration awarded by this state or by another state or by the United States, provided such state or district of registration grants substantially similar privileges for snowmobiles or all-terrain vehicles owned by residents of this state and registered under its laws, and unless the identification number set forth in such registration is displayed on such snowmobile or all-terrain vehicle as prescribed in section 14-381, provided every resident of this state shall obtain such registration from this state under the provisions of section 14-381, before such operation shall be lawful. The provisions of this section shall not apply (1) to the operation of a snowmobile or all-terrain vehicle on premises owned or leased by the owner of such snowmobile or all-terrain vehicle or (2) to the operation of a snowmobile in any organized contest as long as such snowmobile is operated in the contest area, provided the owner of such snowmobile holds a valid, effective registration awarded by this state or by another state or the United States.