Section 123B(6) in The Delhi Municipal Corporation Act, 1957
(6)In the case of any new building for which an occupancy certificate has been granted, or which has been occupied, after the coming into force of the Delhi Municipal Corporation (Amendment) Act, 2003, such payment shall be made, and such return shall be furnished, within thirty days of the expiry of the quarter in which such occupancy certificate is granted or such building is occupied, whichever is earlier.Explanation.-For the removal of doubt, it is hereby declared that occupancy certificate may be provisional or final and may be for the whole or any part of the building and occupancy may be of the whole or any part of the building.