315 ILCS 10/5

When the Governor has adopted the recommendation of the Board, he shall thereupon execute a declaration taking the site on behalf of the State of Illinois and estimating the compensation for the site. He shall then request the Attorney General to institute eminent domain proceedings to take the site, furnishing him with the declaration of taking and the sum estimated as compensation for the site. It shall thereupon become the duty of the Attorney General, within 60 days thereafter, to institute eminent domain proceedings, file the declaration of taking, and deposit the estimated compensation with the Clerk of the Court. Title to the site shall thereupon vest in the State of Illinois.