Nebraska Revised Statute 89-1,101.02
Every person who keeps, sells, or uses a commercial weighing and measuring device shall keep and make available for examination by the department for a period of three years at a minimum the following records:
(1) All invoices generated from a sale from bulk;
(2) Bills of lading, invoices, or other pertinent data relating to commodities bought or sold; and
(3) Any other information that would verify accurate quantity determinations by weight, measure, or count.
Laws 1991, LB 356, § 33.