Be it further enacted, that all fines imposed by the city court for violations of city ordinances shall belong to and be paid into the treasury of the city; and any labor performed in the execution of a workhouse or prison sentence for such violation or violations shall be performed for the city under the direction of the city manager, or by official agreement for the county through the county workhouse. (As amended by Priv. Acts 1972, ch. 416, sec. 21, and Priv. Acts 2014, ch. 55, sec. 1)