Sec. 1. General provisions.
   Any member of the commission may be removed from office by recall. Any voter of the city may make and file with the city secretary an affidavit containing the name of any member of the commission whose removal is sought and a statement of the grounds for removal. The city secretary shall thereupon deliver to the voter making such affidavit, copies of petition blanks demanding such removal, printed forms of which the city secretary shall keep on hand. Such blanks shall be issued by the secretary with the city secretary’s signature and official seal thereto attached; they shall be dated and addressed to the commission and shall indicate the name of the person to whom issued, the number of blanks so issued, and the name of the member whose removal is sought. A copy of the petition shall be entered in the record book to be kept for the purpose in the office of the secretary. If the Mayor or one of the at-large commissioners’ removal is sought, the recall petition to be effective must be returned and filed with the secretary within thirty days after the filing of the affidavit, and it must bear the signatures of voters of the city to the number of at least fifty percent of the number of voters who cast their votes at the last preceding regular municipal election; provided, however, that the petition shall not be effective unless it bears the signatures of at least one hundred voters of the city.
   If the removal of a district commissioner is sought the recall petition to be effective must be returned and filed with the city secretary within thirty days after the filing of the affidavit and bear the signatures of voters of said district in a number equal to at least fifty percent of the number of voters who voted in the district at the last preceding regular municipal election at which said district commissioner was elected; provided, however, the petition shall not be effective unless it bears the signatures of at least one hundred voters of the said district.