Cal. Pub. Util. Code § 30754
The district shall not acquire any existing transit system or part thereof whether by purchase, lease, condemnation, or otherwise, or dispose of or lease any transit system or part thereof, or merge, consolidate or coordinate any transit system or part thereof, or substitute any type of equipment on any system or part thereof for the then existing equipment or terminate any lease arrangement or management contract, or reduce or limit the lines or service of any existing system or of its system unless it shall first have made adequate provision for the district's employees who are or may be displaced, or whose wages, hours, place or conditions of employment are or may be adversely affected. The terms and conditions of such provisions shall be a proper subject of collective bargaining with the labor organizations that represent such employees. In the event the parties are unable to agree upon such provisions the dispute shall be submitted to arbitration. The arbitrator shall be selected according to procedures established by subdivision (d) of Section 30750. The decision of the arbitrator shall be final and binding on the parties. In the event that at the time the district acquires a system or part thereof, and former or furloughed employees of such system are at that time entitled to protection under a collective bargaining agreement or an order of the Public Utilities Commission or other public agency, the district shall provide for the continuation of such protection for the period of the agreement or order.
Ca. Pub. Util. Code § 30754