It shall be the duty of the Director of Public Safety and Service immediately after the passage of the resolution referred to in Section 1309.04 to furnish the owner or person having principal charge of such insecure, dangerous or hazardous building, or the owner of the lot on which the same may be situated, with a copy of the resolution of Council declaring such building to be a nuisance, together with a notice to remove or abate the same within twenty days from the service of same. (1993 Code 150.14)