Section 39.02.60.011 - LICENSE PLATE PROVISIONS FOR ALL LICENSE PLATES01.Plate Numbering and Lettering. The Idaho Transportation Department is authorized to assign unique plate letter/number spacing schemes and to use specific letter/number combination schemes as needed for the purpose of ensuring unique numbering systems for all license plate programs and to administer the provisions of this rule.02.Plate Life Expiration Date. License plates will be valid for the period described in 49-443 (2) and will expire on the last day of the month, consistent with the month of the registration expiration.Idaho Admin. Code r. 39.02.60.011