No user not licensed as a plumber or licensed and bonded contractor, pursuant to the requirements hereof, shall engage in the business of repair or replacement of a building drain or building sewer, without first obtaining a permit from the POTW and filing a corporate surety bond with the POTW in an amount to be specified by the POTW, such that the principal and surety shall hold POTW harmless from any and all injuries to persons or damage to property, and particularly to the sewer mains, caused by or through the cleaning or removal of any stoppage in any drain or sewer, and further conditioned that the principal will faithfully observe all ordinances, rules and regulations of said POTW pertaining to plumbing and sewers. (Ord. 68-11, 2011)