272 Neb. Admin. Code, ch. 5, § 008
A permit, or copy of the permit, to store shall be posted at each storage site.
A person possessing a permit to use explosives shall have that permit on his or her person at any time he or she is engaged in or directing any blasting operation.
A permit to purchase explosives by a business enterprise shall be kept under lock and key at the business headquarters of the permittee. The permit shall be presented to any dealer or any other person from whom explosives are to be purchased. The actual purchase shall be made by an officer or other person having control of the affairs of the business enterprise or by the licensed user employed by the business enterprise. After the purchase the permit shall be returned to the business enterprise files and kept under lock and key.
272 Neb. Admin. Code, ch. 5, § 008