The governing body of any county availing itself of the provisions of this Act shall adopt a resolution describing in a general way the coal processing plant and system to be constructed and refer to plans and specifications therefor prepared for that purpose which shall be open to the inspection of the public. Said resolution shall set out the estimated cost of such coal processing plant and system and fix the amount of bonds proposed to be issued, maturity, interest rate and all details in respect thereof. Revenue bonds issued under the provisions of this Act shall be payable solely from the revenues derived from such plant and system, and such bonds shall not in any event constitute an indebtedness of such county within the meaning of the constitutional provisions or limitations, and it shall be plainly stated on the face of each bond that the same has been issued under the provisions of this Act and that it does not constitute an indebtedness of such county within any constitutional or statutory limitation.
     After said resolution has been adopted and approved, it shall be published once in a newspaper published and having a general circulation in such county, or if there be no such newspaper, then copies of said ordinance shall be posted in at least four public places, and after the expiration of ten days from the date of such publication, shall be in full force and effect.