In the event that weather conditions or other factors beyond the control of the applicant, exclusive of financial hardship, renders it unreasonable to require the applicant to fully comply with the site plan prior to the beginning of a use or occupancy of any building, the planning department may authorize relaxation of this requirement on the condition that the applicant completes all requirements within a specified time, not to exceed one year. If the requirements are not completed within the required period, the use or occupancy of the property and/or buildings shall cease until all requirements are satisfied.