The Board of Supervisors may, from time to time, amend, supplement, change, modify or repeal this chapter, including the Zoning Map. The Board of Supervisors shall, at least 45 days prior to a public hearing thereon, submit to the Township Planning Commission a copy of the proposed amendment, supplement, change, modification or repeal, as the case may be, and no action shall be taken thereon by the Board of Supervisors until such time as the Township Planning Commission shall submit to the Supervisors its written recommendation relative thereto, or until the expiration of 30 days from the time of submission by the Supervisors to the Planning Commission of said proposed action, whichever shall first occur. Before voting on the enactment of an amendment, the Supervisors shall hold a public hearing thereon, pursuant to public notice, as required by the Pennsylvania Municipalities Planning Code. In addition, if the proposed amendment involves a Zoning Map change, notice of said public hearing shall be conspicuously posted by the Township using paper, cardstock or like material, with a bright red background, at points deemed sufficient by the municipality along 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.