per Nebraska Revised State Statute
71-6406; If a county,
city, or village does not adopt a code as authorized under subdivision (a) of this subsection within two years after an update to the state building code, the state building code shall apply in the county,
city, or village, except that such code shall not apply to construction on a farm or for farm purposes. The current state building code as stated in Nebraska Revised State Statute
71-6403 .