Cal. Pub. Util. Code § 21653

Any person authorized to exercise the power of eminent domain for airport purposes may provide, by purchase, gift, devise, lease, condemnation, or otherwise, for the removal or relocation of any airport hazard or the removal or relocation of all facilities, structures, and equipment that may interfere with the location, expansion, development, or improvement of the airport and other air navigation facilities or with the safe approach thereto and takeoff therefrom by aircraft. Any person acting under authority of this section shall pay the cost of such removal or relocation.