California Code, Public Utilities Code - PUC § 120550

The board may establish and maintain a police force.  Those employees of the board appointed by the general manager or chief executive officer to the police force and who are duly sworn are peace officers and are subject to the powers set forth in Section 830.33 of the Penal Code.  The board shall adhere to the standards for recruitment and training of peace officers established by the Commission on Peace Officer Standards and Training pursuant to Title 4 (commencing with Section 13500) of Part 4 of the Penal Code.