Section 415(1) in The Delhi Municipal Corporation Act, 1957
(1)No person shall without or otherwise than in conformity with a licence from the Commissioner carry on the trade of a butcher, fish-monger, poulterer or importer of flesh intended for human food or use any place for the sale of flesh, fish or poultry intended for human food:Provided that no licence shall be required for any place used for the sale or storage for sale of preserved flesh or fish contained in airtight or hermetically sealed receptacles.