Temporary use of one mobile home on a lot whereon an existing residential structure has been destroyed by fire, natural disaster, explosion or similar catastrophe while a new residential structure is being constructed. The use shall be for 12 months, unless extended not more than an additional 12 months (total period of time of two years) by the Planning/Zoning Board wherein it can be reasonably demonstrated that actual construction has been delayed by factors outside the control of the applicant. The temporary use of the trailer shall cease and the mobile home shall cease to be occupied and shall be removed from the property involved within one month of the date of issuance of a Certificate of Occupancy for the new residential structure.