Section 211. (a) The charter commission shall be discharged upon the filing of its report: Provided, That if the commission's recommendations require further procedure on the part of city council or the people of the city, the commission shall not be discharged until a copy of the report has been certified to the county board of elections. Any time before such procedure has been finally concluded but not later than one year from the date of the publication of its final report, the commission may modify or change any recommendation set forth in said final report by publishing an amended report.
(b) Whenever a charter commission issues an amended report pursuant to subsection (a) above, such amended report shall supersede the final report and such final report shall cease to have any legal effect under this act.
(c) The procedure to be taken under the amended report shall be governed by all provisions of Article II. of this act applicable to the final report of a charter commission submitted pursuant to section 210 of this act.