921.31 RIGHTS RESERVED TO GRANTOR.
   (a)   In addition to any rights specifically reserved to the Grantor by this chapter, the Grantor reserves to itself every right and power which is required to be reserved by a provision of any ordinance or under the Franchise.
   (b)   The Grantor shall have the right to waive any obligation of Grantee under the Franchise or any provision of the Franchise, except those required by federal or State regulation, if the Grantor determines:
      (1)    That it is in the public interest to do so, and
      (2)    That the enforcement of such provision will impose an undue hardship on the Grantee or the Subscribers.
   To be effective, such waiver shall be evidenced by a statement in writing signed by the Mayor. Waiver of any provision in one instance shall not be deemed a waiver of such provision subsequent to such instance nor be deemed a waiver of any other provision of the Franchise unless the statement so recites.