Upon an affirmative determination, in the case of a modification of 5% or less, the Zoning Enforcement Officer shall have the authority to issue a permit approving the modification, without any public notice requirements. In the case of a modification of greater than 5%, the Director shall notify by first class mail all property owners abutting the property which is the subject of the modification request, and shall indicate the street address of the subject property in the notice, and shall publish in a newspaper of local circulation within the city that the modification will be granted unless written objection is received within 14 days of the public notice. If written objection is received within 14 days, the request for a modification shall be scheduled for the next available hearing before the Zoning Board of Review, including notice requirements provided for under this chapter. If no written objections are received within 14 days, the Director shall grant the modification. The Director may apply such conditions to the permit as may, in the opinion of the Director, be required to conform to the intent and purposes of the Zoning Ordinance. The Director shall keep public records of all requests for modifications, and of findings, determinations, special conditions, and any objections received. The costs of any notice required under this section shall be borne by the applicant requesting the modification.