The Township Board of Supervisors may, from time to time, on its own motion or on petition or recommendation of the Planning Commission, amend, supplement or repeal any of the regulations and provisions of this chapter after public notice and hearing. Before the public hearing, each proposed amendment, except those coming from the Township Planning Commission, must be referred to the Township Planning Commission for its recommendations at least 30 days prior to the hearing on such amendment. If, after any public hearing held upon an amendment, the proposed amendment is revised or further revised to include land previously not affected by it, the governing body shall hold another public hearing, pursuant to public notice, before proceeding to vote on the amendment. At least 30 days prior to the hearing on the ordinance or amendment by the Township Board of Supervisors, the Township Planning Commission shall submit the proposed ordinance or amendments to the Perry County Planning Commission for recommendations. In addition, if the proposed amendment involves a zoning map change, notice of said public hearing shall be conspicuously posted by the municipality at points deemed sufficient by the municipality along the perimeter of the tract to notify potentially interested citizens. The affected tract or area shall be posted at least one week prior to the date of the hearing.