The board of directors of any tuberculosis sanitarium district organized hereunder shall have power to raise money by general taxation, for any of the purposes enumerated in this Act, and power to borrow money upon the faith and credit of such district, and to issue bonds therefor. Such district shall not become indebted in any manner or for any purpose, to any amount including existing indebtedness in the aggregate exceeding 1/2% of the assessed value of the taxable property therein, as ascertained by the last equalized assessment for State and county purposes. No such district shall incur indebtedness for any purpose other than the acquisition of land unless the proposition to issue bonds or otherwise incur such indebtedness shall have been first submitted to the legal voters of such district and shall have been approved by a majority of those voting upon the proposition. The board of directors shall certify its resolution or ordinance and the proposition to the proper election officials, who shall submit the proposition to the voters at an election in accordance with the general election law. Before or at the time of issuing bonds, the board of directors shall provide by ordinance for the collection of an annual tax sufficient to pay the interest on such bonds as it falls due, and to pay such bonds as they mature and the tax to so pay the interest on the bonds as it falls due and to pay the bonds as they mature, shall not be permitted to increase the taxing power of the district as herein provided for. All bonds issued by any tuberculosis sanitarium district shall be divided into series, the first of which shall mature not later than 5 years after the date of issue and the last of which shall mature not later than 20 years after the date of issue.
     All general taxes levied by the board of directors of any tuberculosis sanitarium district shall be levied at the same time and in the same manner as taxes are levied for city and village purposes; provided, that the amount of taxes levied for one year shall not exceed the rate of .075 per cent of value, as equalized or assessed by the Department of Revenue; provided, further, that the foregoing limitations upon tax rates may be increased or decreased under the referendum provisions of the General Revenue Law of Illinois. All moneys collected under this Act shall be paid to the treasurer of such district.