§ 99.51  ACCEPTANCE OF IMPROVEMENT; PAYMENT.
   Where the improvement provided for in the ordinance is constructed under contract with the city, the Board of Officers shall upon the completion and acceptance of said improvement report such completion and acceptance to the Council.  The Mayor and City Clerk are thereupon authorized to issue noninterest bearing vouchers to the contractor in payment for such improvement, payable solely out of the special tax provided for in this code when the same is collected.
('68 Code, § 6.25)