70 ILCS 200/25-50
Six members of the Committee shall constitute a quorum for the transaction of business. All actions of the Committee shall be by ordinance or resolution, and the affirmative vote of at least 6 members shall be necessary for the adoption of any ordinance or resolution. Before taking effect, all ordinances and resolutions shall be approved by the chairman of the Committee by signing the ordinance or resolution. If the chairman does not approve of an ordinance or resolution, he shall return it to the Committee with written objections at the next regular meeting of the Committee after the passage of the ordinance or resolution. If the chairman fails to return the ordinance or resolution with written objections at that meeting, the ordinance or resolution takes effect as if the chairman had approved it. Upon the return of a resolution or ordinance by the chairman with written objections, the Committee shall reconsider its vote. If upon reconsideration the resolution or ordinance passes with at least 7 votes, it shall take effect notwithstanding the veto of the chairman.
70 ILCS 200/25-50