Whenever the public necessity, convenience, or general welfare indicates, the Council of the Borough of Zelienople may, by ordinance in accordance with applicable laws of the State of Pennsylvania, amend, supplement, or change the regulations, restrictions, boundaries or classifications of buildings, structures, and land, as the same are established by this chapter, or may hereafter be made a part thereof.

Applications or petitions for any change or amendments to existing zoning districts in the Borough shall be made to the Secretary of Council. Said applications, fees set forth as per § 280-1503, Fees, or petitions shall include plats, maps and other data that is deemed necessary by the Borough Council and Planning Commission for consideration of the proposed action.

The Borough Council may from time to time, on its own motion or petition, after public notice and hearing, amend the regulations and districts herein established, but no amendment shall become effective unless the same shall have first been submitted to the Planning Commission for approval, and said Commission shall have allowed 30 days' time for consideration and report.

Any owner of land situated within the Borough may challenge, on substantive grounds, the validity of this chapter or any provision thereof that prohibits or restricts the use of development of land in which he has an interest. Said owner may submit a curative amendment to the Borough Council together with written documentation of the basis for the challenge to the existing ordinance and fees set forth in § 280-1503.

Should the Council of the Borough of Zelienople at any time suspect that this chapter or any portion thereof is invalid, by failure of its provisions to allow for a legitimate land use or a reasonable quantity of a particular use, it may declare the chapter invalid. The invalidation of the chapter shall provide the Borough with up to six months' immunity. During this time, corrective measures to amend the deficiencies in the chapter or to invalidate portions of the chapter shall be accomplished. This provision shall not be invoked at intervals of less than 36 months.

If a proposed amendment involves a Zoning Map change, notice of said public hearing shall be conspicuously posted by the Borough at points deemed sufficient along the perimeter of the tract to notify potentially interested citizens. The affected tract or areas shall be posted at least one week prior to the date of the hearing.