This chapter may not be construed as in any way limiting the rights and powers of a municipality to grant or refuse franchises to use the streets and alleys within its limits and to make the statutory charges for their use, but no provision of any franchise agreement may limit or interfere with any power conferred on the utility commission by this chapter. If a municipality performs regulatory functions under this chapter, it may make such other charges as may be provided in the applicable franchise agreement, together with any other charges permitted by this chapter.