If the mayor shall grant such petition, the petitioner shall either: a) enter into a contract with the city whereby the petitioner shall install the extension entirely at petitioner's expense, but pursuant only to plans and specifications prior approved by the director, or b) within thirty (30) days, or such other time as the director shall indicate after the granting thereof, deposit the amount of the cost and expense of making such extension, as certified by the director, with the city treasurer. Such work shall either be done by or contracted for by the city. (Ord. 36-93 § 5, 1993: prior code § 37-4-19)