Illinois constitution
Article IV
Section 9

(e) The Governor may return a bill together with
specific recommendations for change to the house in which it
originated. The bill shall be considered in the same manner
as a vetoed bill but the specific recommendations may be
accepted by a record vote of a majority of the members
elected to each house. Such bill shall be presented again to
the Governor and if he certifies that such acceptance
conforms to his specific recommendations, the bill shall
become law. If he does not so certify, he shall return it as
a vetoed bill to the house in which it originated.