Upon the receipt of an application for a license or permit where laws of the city necessitate an inspection or investigation before the issuance of such permit or license, the city clerk shall refer such application to the proper officer for making such investigation within forty eight (48) hours of the time of such receipt. The officer charged with the duty of making the investigation or inspection shall make a report thereon, favorable or otherwise, within ten (10) days after receiving the application or a copy thereof. All investigations, except where otherwise provided, shall be made by some officer designated by the mayor. (2015 Code)