California Code, Public Utilities Code - PUC § 7556

The governing body of a county, city and county, or city, under such regulations, restrictions, and limitations, and upon such terms and payment of license tax as the county, city and county, or city may provide, may grant franchises to railroad corporations for the construction of elevated or underground railroad tracks over, across, or under the streets and public highways of any such county, city and county, or city, for a term not exceeding 50 years. Before granting such franchise there shall be presented to the governing body a petition signed by the owners of a majority of the landed property, other than public property, on the line of the elevated portion applied for.