25 ILCS 82/35
Whenever any committee of either house reports any bill with an amendment that will substantially affect the figures stated in the housing affordability impact note attached to the measure at the time of its referral to the committee, there shall be included with the report of the committee a statement of the effect of the change proposed by the amendment reported if desired by a majority of the committee. Whenever any bill is amended on the floor of either house to substantially affect the figures as stated in the housing affordability impact note attached to the bill before the amendment, a majority of the members of that house may propose that no action shall be taken on the amendment until the sponsor of the amendment presents to the members a statement of the housing affordability impact of the proposed amendment.
25 ILCS 82/35