Privilege is granted to the several railroad companies to use wood as well as coal or coke as a fuel for steam within the limits of the City of Baltimore in all cases where by ordinance steam engines are permitted to be used. Provided, however, that nothing herein contained shall be so construed as to prevent the Mayor and City Council of Baltimore from repealing all or any part of this section, whenever they may deem it expedient. City Code, 1879, art. 40, §16 1893, art. 41, §16 1927, art. 39, §17 1950, art. 29, §15 1966, art. 20, §22 1976/83, art. 20, §15 Rev. Ords. 1858-67 Ord. 48-512