CRS 42-3-103 & 42-6-140
All motor vehicles and trailers owned or operated by a Colorado resident must be registered. A Colorado address is mandatory as the legal address. A Post Office Box is not acceptable as a legal address, but may be used for the mailing address.
A named owner's secure and verifiable identification information is required to be presented for all new registration transactions. A named owner will provide a non-secure power of attorney to their agent to include the grantor's (names owner's) secure and verifiable identification information. The agents secure and verifiable identification information is required to be presented for all new registration transactions to someone other than a named owner. (See SVID information.)
Colorado requirements for residency are whichever of the following occurs first:
**Note** CRS 42-3-103 (4)(a) motor vehicle registration must be completed within 90 days after becoming a resident of Colorado.
Criteria used to establish residency in the county is: (CRS 42-6-139)
Military personnel, on active duty in Colorado and who claim another state as their home state of residence shall register their vehicle(s) in Colorado. To obtain exemption from paying Specific Ownership Tax, the active duty military personnel must be owner or co-owner of the vehicle and complete the DR 2667 Affidavit of Non-residence and Military Exemption from Specific Ownership Tax. This DR 2667 must be completed each year at time of renewal or with the application for registration of a newly purchased vehicle. These individuals are in Colorado because they are required to be here by their branch of service. Please see C.R.S. 42-3-103 for complete details.
An out of state student is one who does not claim Colorado as their state of residence and is residing temporarily in Colorado for the primary purpose of attending a college, university or another accredited school or educational institution or training in a hospital. Colorado has reciprocity with all states regarding the validity of out of state plates for students. Their primary purpose to be in Colorado is to further his/her education, therefore, they will not be required to register their vehicle in Colorado.