(1) An employer may only conduct surveillance of a worker using an optical surveillance device if—
(a) the optical surveillance device used for the surveillance is clearly visible in the workplace where the surveillance is conducted; and
(b) a sign is clearly visible at each entrance to the workplace, telling people that they may be under surveillance in the workplace.
(2) In this section:
"optical surveillance device" includes a camera casing or other equipment that generally indicates the presence of an optical surveillance device.