Section 346(1) in The Delhi Municipal Corporation Act, 1957
(1)Every person who employs a licensed architect or engineer or a person approved by the Commissioner to design or erect a building or execute any work shall, within one month after the completion of the erection of the building or execution of the work, deliver or send or cause to be delivered or sent to the Commissioner a notice in writing of such completion accompanied by a certificate in the form prescribed by bye-laws made in this behalf and shall give to the Commissioner all necessary facilities for the inspection of such building or work.