California job location. I am interested in determining what code required safety features would be required for a large 15'x 25' video screen to be able to move up and down thru a stage platform. It will recess down into the stage and the service/staging area will be below the stage. The equipment manufacturer is not in the US but have installed in the US. They are proposing sliding gate barriers and laser beams and pressure pads to ensure that no one can be near the device when it is in motion. They have requested that we explore the local requirements and codes to see if what they are providing is adequate. I have found some hoisting and rigging requirements in Cal OSHA 1926.753, but this is more for cranes. Who has jurisdiction over these types of devices when it pertains to safety and operation?