Neb. Rev. Stat. §§ 18-2309
All applicants who have successfully passed an examination may, prior to receiving a certificate of competency, be required by the air conditioning air distribution board to furnish a corporate surety bond in the penal sum of not more than ten thousand dollars conditioned that the applicant shall, in all material furnished by the applicant and in all work performed by the applicant and performed within the city or village or within the extraterritorial zoning jurisdiction of cities of the metropolitan class, in installing, altering, and repairing any air conditioning air distribution system or ventilating system, strictly comply with all regulations of the air conditioning air distribution board and ordinances of the city or village related thereto.
Neb. Rev. Stat. §§ 18-2309