625 ILCS 5/3-606.5
Upon receipt of a request from a retired executive branch constitutional officer, accompanied by the appropriate application and fee, the Secretary of State shall issue to the retired executive branch constitutional officer plates bearing appropriate wording or abbreviations indicating that the holder is a retired executive branch constitutional officer and the office held. The special plates issued under this Section shall be affixed only to passenger vehicles of the first division, motorcycles, autocycles, and motor vehicles of the second division weighing not more than 8,000 pounds. Such plates may be issued for a 2-year period beginning on January 1 of each odd-numbered year and ending on December 31 of the subsequent even-numbered year. Upon the death of a retired executive branch constitutional officer who has been issued a retired executive branch constitutional officer plate, the retired executive branch constitutional officer's surviving spouse shall be entitled to retain the plate so long as the surviving spouse is a resident of Illinois and transfers the registration to his or her name within 90 days of the death of the retired executive branch constitutional officer. For purposes of this Section, "retired executive branch constitutional officer" means any individual who has served at least one full term of office as (i) Governor; (ii) Lieutenant Governor; (iii) Attorney General; (iv) Secretary of State; (v) Comptroller; or (vi) Treasurer; and who was not removed from office pursuant to Section 14 of Article IV of the Illinois Constitution of 1970.
625 ILCS 5/3-606.5