The board of trustees of a fire protection district which: (1) lies within a single county which has a population between 400,000 and 575,000; or (2) lies within 2 counties with respective populations of between 400,000 and 575,000 and between 900,000 and 1,000,000, may by ordinance levy an annual tax at a rate not exceeding .095% of the value, as equalized and assessed by the Department of Revenue, of all taxable property therein, for the purpose of providing ambulance services pursuant to an intergovernmental cooperation agreement with any other unit of local government. However, no tax may be levied pursuant to this Section with respect to any property which is subject to any other tax levied for the purpose of providing ambulance services.