Neb. Rev. Stat. § 2-2659

Each aerial pesticide business shall maintain records of applications of pesticides by use of an aircraft that are required by the department, and the department may require such records to be kept separate from other business records. The department may adopt and promulgate rules and regulations regarding the information to be included in the records. The aerial pesticide business shall keep such records for a period of at least three years, provide the department with access to examine such records, and provide the department a copy of any such record upon request.