The board shall have power to levy taxes for debt service of the district disposal system, including solid waste disposal facilities, upon all taxable property within the district without limitation of rate or amount and without affecting the amount or rate of taxes which may be levied by the board for other purposes or by any local government unit in the district. No other provision of law relating to debt limit shall restrict or in any way limit the power of the board to issue the bonds and certificates authorized in section 458D.14. The board shall also have power to levy taxes as provided in section 458D.11. Each of the county auditors shall annually assess and extend upon the tax rolls of the auditor's county the portion of the taxes levied by the board in each year which is certified by the board. Each county treasurer shall collect and make settlement of such taxes with the treasurer of the board.