Where any tract of land has not been assessed for any existing abutting sanitary sewer
and has been excepted from the levy of the assessment for the same, and a new sewer
has not been built for which it may be assessed, no permit shall be granted to connect
such tract of land with the city sanitary sewer except upon payment of a connection
charge in the amount of twenty-five dollars ($25.00) per assessable front foot to
a depth of one hundred fifty (150) feet; except that where a public sewer has been
built under private contract and paid for by one (1) or more owners of land thereby
served or provided to be served under a permit authorized by the city council, and
in accordance with conditions specified in such permit, in any such case a permit
shall be granted to connect all or any of the land which such sewer is intended to
drain and which abuts on such sewer without payment of a connection charge.