Any territory which lies within a mosquito abatement district and which lies within a county which levies a tax for mosquito abatement pursuant to Section 25.05-4 of "An Act in relation to counties", approved March 31, 1874, as heretofore or hereafter amended, shall be disconnected from such mosquito abatement district upon the action by the county board of such county which levies such tax and shall cease to be a part of such district. Such land shall not, however, be relieved from any bonded indebtedness of the district previously created as to its proportionate share thereof.
70 ILCS 1005/13a