70 ILCS 1310/7
For the purpose of carrying out the powers conferred by this Act, the board of park commissioners is hereby authorized to incur indebtedness (in addition to any indebtedness heretofore authorized) in an amount not exceeding in the aggregate the sum of Twenty Million Dollars ($20,000,000.00) and in evidence of such indebtedness to issue and sell from time to time its negotiable bonds to an amount not exceeding in the aggregate the principal sum of Twenty Million Dollars. However, nothing herein contained shall be construed to authorize the incurring of indebtedness and issuing bonds in evidence thereof which, when added to existing indebtedness, will make the total indebtedness of said park district exceed five per cent (5%) of the value of taxable property within said park district as ascertained and determined from the last assessment from state and county taxes previous to the incurring of such indebtedness and the issuance of such bonds.
70 ILCS 1310/7