Nebraska Revised Statute 60-3,214
Snowmobiles; registration; exemptions.
No registration shall be required for snowmobiles:
(1) Owned and used by the United States, another state, or a political subdivision thereof;
(2) Registered in a country other than the United States and temporarily used within this state;
(3) Covered by a valid license of another state and which have not been within this state for more than thirty consecutive days; and
(4) Which are operated only on land owned or leased by the owner thereof.