Public Utilities Code § 6467
CHAPTER 3. Resettlement of Street, Suburban, and Interurban Railroad Franchises
Nothing in this chapter, nor any provision of any franchise granted under this chapter, shall prevent a city or city and county from acquiring at any time the property of any public utility through the exercise of the right of eminent domain, and no city or county shall contract away, either for a term or in perpetuity, the right of eminent domain in respect to any public utility.