In each registration period in which new license plates are not issued, previously issued license plates shall have affixed thereto the validation decals issued pursuant to section 60-3,101. In all cases such license plates shall be securely fastened in an upright position to the motor vehicle or trailer so as to prevent such plates from swinging and at a minimum distance of twelve inches from the ground to the bottom of the license plate. No person shall attach to or display on such motor vehicle or trailer any (a) license plate or registration certificate other than as assigned to it for the current registration period, (b) fictitious or altered license plates or registration certificate, (c) license plates or registration certificate that has been canceled by the department, or (d) license plates lacking current validation decals.
Neb. Rev. Stat. §§ 60-399