§ 31.04  ANNEXATION.
   (A)   At the time of such annexation, the owners petitioning for such annexation shall file written undertaking signed by sureties satisfactory to the City Council in such penal sum as it may require, but in no case in excess of the estimated cost of all necessary storm sewers, sanitary sewers, curbs, gutters, sidewalks, and of dust-proofing, which undertaking shall provide that all of said improvements shall be made as ordered by the City Council, otherwise the penal sum mentioned in the bond shall be forfeited to the city, or in lieu of furnishing such bond the owners, prior to the annexation may install all of said improvements, and the petitioners for annexation shall show that such improvements have been previously installed by petitioning for such annexation.
   (B)   All such sanitary sewers, storm sewers, curbs, gutters, and sidewalks shall be designed and constructed in accordance with the grades and specifications established by the City Engineer and approved by the Mayor and City Council. All engineering work necessary for the establishment of grade lines to comply with the grades and specifications of the city shall be done by the owner at the owner’s expense, but shall be, prior to any construction, approved by the City Engineer.
(Prior Code, § 2-4-1)