Section 125(1) in The Delhi Municipal Corporation Act, 1957
(1)[A Corporation] [Substituted by Delhi Act 12 of 2011, section 2(a) for "the Corporation" (w.e.f. 13-1-2012)] shall cause to be maintained a register wherein the property identification code numbers by which any premises or part thereof shall be known, shall be recorded in respect of each such premises in the municipal area and such numbers shall be fixed in such manner as may be specified in the bye-laws.