Nebraska Revised Statute 13-927
Chapter 13 Section 927
Skatepark and bicycle motocross park; sign required; warning notice.
(1) A political subdivision shall post and maintain a sign at each skatepark and bicycle motocross park sponsored by the political subdivision containing the following warning notice: Under Nebraska law, a political subdivision is not liable for an injury to or the death of a participant in recreational activities resulting from the inherent risks of the recreational activities pursuant to section 13-910.
(2) The absence of a sign shall not give rise to liability on the part of the political subdivision.