Within 10 days after filing the proposed home rule charter, the borough clerk shall have it published. In addition, the clerk shall have a copy of the proposed charter posted in at least three public places in each city and each unincorporated community in the borough. Copies of the proposed charter shall be made available by the assembly to the public at both the office of the borough clerk and the office of the clerk of each city in the borough. The clerk shall have notice of the publication, posting, and availability of the proposed charter published.