The County may grant one or more cable franchises containing such provisions as are reasonably necessary to protect the public interest, and each such cable franchise shall be awarded in accordance with and subject to the provisions of this Chapter. This Chapter may be amended from time to time, and in no event shall this Chapter be considered a contract between the County and a cable franchisee such that the County would be prohibited from amending any provision hereof, provided no such amendment shall in any way impair any contract right or increase obligations of a cable franchisee under an outstanding and effective cable franchise except in the lawful exercise of the County's police power.