Section 516(2)(f) in The Delhi Municipal Corporation Act, 1957
(f)all rates, taxes, fees, rents, fares and other charges shall, until and unless they are varied by [a Corporation] [Substituted by Delhi Act 12 of 2011, section 2(a), "for the Corporation" (w.e.f. 13-1-2012)] continue to be levied at the same rate at which they were being levied by the aforesaid bodies or local authorities immediately before such establishment;