When a permit has been issued for a private sewer or drain as provided in this chapter, no additional work shall be undertaken without the approval of the city and a new permit must be issued at the regular charge for such permit covering all such additional work. (Ord. 5852 § 1, 2004; Ord. 5212 § 1 (Exh. I), 1999; Ord. 4241 § 2, 1987.)