Elections on propositions arising in connection with the exercise of any of the powers granted by sections 14-1201 to 14-1252 may be submitted by the governing body of the city to the electors thereof at any general, city or state election or at any special election called for that purpose, and any proposition shall be carried if a majority of the electors voting thereon vote in favor thereof. No bridge shall be finally or irrevocably acquired whether by purchase or by condemnation, or by construction, until such action and the necessary financing shall have been approved by a majority of the electors voting on the proposition at a general city or state election or at a special election called for that purpose, or shall have been approved by the governing body of the city, as authorized by said sections. Two or more propositions or questions may be submitted at the same election and on the same ballot provided each is so presented that the electors may vote separately upon each proposition. A vote of the electors authorizing independent action shall be held to also authorize joint action for the purpose so authorized but a vote on a proposition of joint action shall not be held to authorize independent action. The governing body of the city is hereby authorized to determine what shall be included in the proposition to be stated in notices of election and upon the ballots in its full discretion except that any proposition must indicate whether the bridge shall be acquired by the purchase or by the condemnation of an existing bridge or by the construction of a new bridge, and the kind of bonds to be issued to finance the same and the amount of such bonds may be set forth in any manner authorized in said sections.