Nebraska Revised Statutes Chapter 14. Cities of the Metropolitan Class § 14-806. Claims; time limit for allowing; payment prohibited, when

No bill or claim for labor, salary, or material, or for extra service or overtime or account of any kind against a city of the metropolitan class, after such bill or claim has been adversely reported on and rejected by the city, and no bill, account, or claim, not presented or claimed within eighteen months after such bill, account, or claim was incurred and payable, shall be allowed or authorized to be paid by the mayor and city council except through the judgment of a court of competent jurisdiction. These provisions shall apply equally to any modification of the same account in whatever form such account may be presented.