No building sewer shall be constructed or connection made to a public sanitary sewer by any person who has not been authorized and licensed to perform such work.
The building sewer and connection to a public sewer shall be constructed as provided in Section 1301.05(d) of the Building Code (Regional Dwelling House Code Section 1593.58).
After the sewer is laid, and before it is covered or used, it shall be inspected and approved by the Service Director or his authorized agent.