Sec.[Section] 1. Be it enacted by the People of the State of Illinois Represented in the General Assembly, That in all cases where a majority of the inhabitants of any Township in this state shall be of opinion that Section number sixteen or any part there of has been valued at a rate so high as to prevent the sale there of; and shall by petition set forth that fact to the Trustees of said Township, they shall cause the same to be re valued and re offered for sale in the same manner as though no valuation had been previously had there on. Provided. That in no case of a second valuation shall it be legal to fix the value there of below the rates at present fixed by law. This act to be in force from and after its passage.