405 ILCS 20/4
In order to provide the necessary funds or to supplement existing funds for such community mental health facilities and services, including facilities and services for the person with a developmental disability or a substance use disorder, the governing body of any governmental unit, subject to the provisions of Section 5, may levy an annual tax of not to exceed .15% upon all of the taxable property in such governmental unit at the value thereof, as equalized or assessed by the Department of Revenue. Such tax shall be levied and collected in the same manner as other governmental unit taxes, but shall not be included in any limitation otherwise prescribed as to the rate or amount of governmental unit taxes, but shall be in addition thereto and in excess thereof.
An annual tax levied by any governmental unit under this Section is separate and distinct from all other property taxes levied by that governmental unit and (1) shall not be considered an increase for purposes of the application of the Truth in Taxation Law and its requirements and (2) shall not be subject to the Property Tax Extension Limitation Law.
When collected, such tax shall be paid into a special fund to be designated as the "Community Mental Health Fund" which shall, upon authorization by the appropriate governmental unit, be administered by the community mental health board and used only for the purposes specified in this Act. Nothing contained herein shall in any way preclude the use of other funds available for such purposes under any existing Federal, State or local statute. Interest earned from moneys deposited in this Fund shall only be used for purposes which are authorized by this Act.
In any city, village, incorporated town, or township which levies a tax for the purpose of providing community mental health facilities and services and part or all of such city, village, incorporated town, or township is in a county or township, as the case may be, which levies a tax to provide community mental health facilities and services under the provisions of this Act, such county or township, as the case may be, shall pay to such city, village, incorporated town, or township, as the case may be, the entire amount collected from taxes under this Section on property subject to a tax which any city, village, incorporated town, or township thereof levies to provide community mental health facilities and services.
Whenever any city, village, incorporated town, or township receives any payments from a county or township as provided above, such city, village, incorporated town, or township shall reduce and abate from the tax levied by the authority of this Section a rate which would produce an amount equal to the amount received from such county or township.
405 ILCS 20/4