Section 6953 Of Chapter 3. Safety Devices From California Labor Code >> Division 5. >> Part 2. >> Chapter 3.

. Any electric car operated in interurban service and any electric locomotive shall be equipped exclusively with laminated safety glass in the compartment of the motorman or engineer, or if there is no compartment, the window in front of the motorman shall be so equipped, if the following conditions concur:
  (a) The car or locomotive is built after the effective date of this section.
  (b) The car or locomotive is operated by an overhead wire.
  (c) The car or locomotive can exceed a speed of 45 miles per hour.