Before voting on the enactment of any amendment, the Board of Supervisors shall hold a public hearing pursuant to the public notice. Such notice shall state the time and place of the hearing, the particular nature of the matter to be considered at the hearing and the full text of the amendment, or a brief summary setting forth the principal provisions in reasonable detail shall be included, together with notice of a place in the Township where a copy of the ordinance or amendment may be examined. The first publication shall be not more than 30 days or less than 14 days from the date of the hearing. If, after any public hearing held upon an amendment, the proposed amendment is revised to include land previously not affected by it, the Board of Supervisors shall hold another public hearing, pursuant to public notice, before proceeding to vote on the amendment.