All bulk fertilizer and bulk liquid pesticide containers and appurtenances will be secured to provide reasonable protection against vandalism or unauthorized access. Valves on containers will be closed and locked or otherwise secured when left unattended, except that a bulk fertilizer or bulk liquid pesticide container used in chemigation will not be required to be closed or locked when used in the act of chemigating.
198 Neb. Admin. Code, ch. 9, § 004