394.4  Contracts with other cities — election.
  Contracts may be made between any city establishing or having established a zoo or zoological garden and any other city or county, but a county may contract only with respect to residents outside of any city, for the use of such zoo or zoological garden or any extension service thereof by its residents, and for the levy of a tax in support thereof. Such contracts shall provide for the rate of tax to be levied during the term thereof, not exceeding twenty-seven cents per thousand dollars of assessed valuation. Said contracts may be submitted to the voters of either city and shall not be subject to termination if approved by the voters of both parties.
  If not so approved, such contracts may be modified by mutual consent or may be terminated by the voters of either party thereto.
  Any such tax shall be subject to cumulative levy limitations applicable generally to the contracting parties unless the contract shall have been approved by the voters.
  Any election held hereunder may be held upon notice and in any manner provided by law applicable to the contracting party with respect to elections upon special public propositions; provided that it shall not be necessary to set out the contract provisions in full as a part of the ballot.
[C75, 77, 79, 81, §394.4]