Section 5. The petition shall be in substantially the following form: To the (city council) (board of selectmen) of (name of city/town) We the undersigned, registered voters of the (city/town of ) respectfully petition your honorable body to cause to be submitted to vote of the voters the following question:— ''Shall the (city/town of ) adopt the optional form of municipal administration summarized as follows, according to the provisions of chapter forty-three C of the General Laws providing for optional plans of municipal administration?'' The text of the summary from the applicable section shall follow.