30 ILCS 105/5e
The Governor, in his discretion, when he deems it necessary for payments of the State's obligations, may authorize transfers from the Road Fund to the State Construction Account Fund. Any amount so transferred shall be retransferred from the State Construction Account Fund to the Road Fund by the end of the fiscal year in which the transfer was made. The transfers out of the Road Fund shall not exceed $35,000,000 in any fiscal year. No transfers from the Road Fund which impair the obligations of the State shall be authorized. The Comptroller and the Treasurer, upon receipt of authorization from the Governor, shall make transfers in accordance with this Section. In the event the Governor fails to authorize the retransfer into the Road Fund as required by this Section, the Comptroller and the Treasurer shall make such retransfer.
30 ILCS 105/5e