Any enclosed portable storage unit made of metal or other durable construction material designed for permanent or temporary storage of personal property which is designed to be transported by vehicle may be permitted as temporary use for a period not to exceed thirty days within a one year period, subject to the following requirements:
(a) Location. Portable storage units must be located on a paved surface and outside the right-of-way.
(b) Size. Portable storage units may not exceed 1,200 cubic feet on the interior.
(c) Calamity Exception. If the portable storage unit is being used to store personal property as a result of a major calamity (e.g. fire, flood or other event where there is significant property damage), the City Manager or his designee may extend the time period allowed in subsection (a) hereof.