Ill. Const. art. VII, § 6. POWERS OF HOME RULE UNITS

(a) A County which has a chief executive officer elected by the electors of the county and any municipality which has a population of more than 25,000 are home rule units. Other municipalities may elect by referendum to become home rule units. Except as limited by this Section, a home rule unit may exercise any power and perform any function pertaining to its government and affairs including, but not limited to, the power to regulate for the protection of the public health, safety, morals and welfare; to license; to tax; and to incur debt. (b) A home rule unit by referendum may elect not to be a home rule unit. (c) If a home rule county ordinance conflicts with an ordinance of a municipality, the municipal ordinance shall prevail within its jurisdiction. (d) A home rule unit does not have the power (1) to incur debt payable from ad valorem property tax receipts maturing more than 40 years from the time it is incurred or (2) to define and provide for the punishment of a felony. (e) A home rule unit shall have only the power that the General Assembly may provide by law (1) to punish by imprisonment for more than six months or (2) to license for revenue or impose taxes upon or measured by income or earnings or upon occupations. (f) A home rule unit shall have the power subject to approval by referendum to adopt, alter or repeal a form of government provided by law, except that the form of government of Cook County shall be subject to the provisions of Section 3 of this Article. A home rule municipality shall have the power to provide for its officers, their manner of selection and terms of office only as approved by referendum or as otherwise authorized by law. A home rule county shall have the power to provide for its officers, their manner of selection and terms of office in the manner set forth in Section 4 of this Article the provisions of Section 3 of this Article. A home rule municipality shall have the power to provide for its officers, their manner of selection and terms of office only as approved by referendum or as otherwise authorized by law. A home rule county shall have the power to provide for its officers, their manner of selection and terms of office in the manner set forth in Section 4 of this Article. (g) The General Assembly by a law approved by the vote of three-fifths of the members elected to each house may deny or limit the power to tax and any other power or function of a home rule unit not exercised or performed by the State other than a power or function specified in subsection (l) of this section. (h) The General Assembly may provide specifically by law for the exclusive exercise by the State of any power or function of a home rule unit other than a taxing power or a power or function specified in subsection (l) of this Section. (i) Home rule units may exercise and perform concurrently with the State any power or function of a home rule unit to the extent that the General Assembly by law does not specifically limit the concurrent exercise or specifically declare the State's exercise to be exclusive. (j) The General Assembly may limit by law the amount of debt which home rule counties may incur and may limit by law approved by three-fifths of the members elected to each house the amount of debt, other than debt payable from ad valorem property tax receipts, which home rule municipalities may incur