California Code, Public Utilities Code - PUC § 102412

The district shall not contract with any company, person, or public agency for that company, person, or public agency to provide transit facilities or services or acquire any existing system, or part thereof, whether by purchase, lease, condemnation, or otherwise, nor shall the district dispose of or lease any transit system, or of its system, or part thereof, nor merge, consolidate, or coordinate any transit system or part thereof, unless it shall first have made adequate provision for any employees who are, or may be, displaced.  The terms and conditions of the provision shall be a proper subject of collective bargaining.