480A.6  Franchise ordinance not superseded.
  This chapter does not modify or supersede the rights and obligations of a local government and the public utility established by the terms of any existing or future franchise granted, approved, and accepted pursuant to section 364.2, subsection 4. A city which collects a city franchise fee from an entity pursuant to section 364.2, subsection 4, under an existing or future franchise, shall not also collect a fee from that entity under section 480A.3.
98 Acts, ch 1148, §8, 9