The regulations, restrictions and boundaries may, from time to time, be amended, supplemented, changed, modified, or repealed, provided that at least seven days’ notice of the time and place of such hearing shall be published in a paper of general circulation in the City. In no case shall the notice be published more than 20 days prior to the hearing. The regulations, restrictions and boundaries may, from time to time, be amended, supplemented, changed, modified, or repealed. Notwithstanding Section 414.2, as a part of an ordinance changing land from one zoning district to another zoning district or an ordinance approving a site development plan, the Council may impose conditions on a property owner which are in addition to existing regulations if the additional conditions have been agreed to in writing by the property owner before the public hearing required under this section or any adjournment of the hearing. The conditions must be reasonable and imposed to satisfy public needs which are directly caused by the requested change. In case, however, of a written protest against a change or repeal which is filed with the Clerk and signed by the owners of 20% or more of the property which is located within 200 feet of the exterior boundaries of the property for property located within the corporate City limits and one-half (1/2) mile for property located outside the corporate limits subject to this chapter, for which the change or repeal is proposed, the change or repeal shall not become effective except by the favorable vote of at least three-fourths (3/4) of all the members of the Council. The protest, if filed, must be filed before or at the public hearing. The party or parties proposing or recommending a change in the district regulations or district boundaries shall deposit with the Clerk, before any action shall be taken, a fee in accordance with the Schedule of Fees shall be collected to cover the approximate costs of this procedure and under no conditions shall said sum or any part thereof be refunded for failure of said amendment to be enacted into law.