(b) Subdivision (a) does not apply to the following equipment when installed in a vehicle:

(1) A vehicle information display.

(2) A global positioning display.

(3) A mapping display.

(4) A visual display used to enhance or supplement the driver's view forward, behind, or to the sides of a motor vehicle for the purpose of maneuvering the vehicle.

(5) A television receiver, video monitor, television or video screen, or any other, similar means of visually displaying a television broadcast or video signal, if that equipment has an interlock device that, when the motor vehicle is driven, disables the equipment for all uses except as a visual display as described in paragraphs (1) to (4), inclusive.

(6) A mobile digital terminal installed in a vehicle owned or operated by an electrical corporation, as defined in Section 218 of the Public Utilities Code, a local publicly owned electric utility, as defined in Section 9604 of that code, a gas corporation, as defined in Section 222 of that code, or a telephone corporation, as defined in Section 234 of that code, if the mobile digital terminal is fitted with an opaque covering that does not allow the driver to view any part of the display while driving, even though the terminal may be operating.

(c) Subdivision (a) does not apply to a mobile digital terminal installed in an authorized emergency vehicle or to a motor vehicle providing emergency road service or roadside assistance.

(d) Subdivision (a) does not apply to a mobile digital terminal installed in a vehicle owned or operated by an electrical corporation, as defined in Section 218 of the Public Utilities Code, a local publicly owned electric utility, as defined in Section 9604 of that code, a gas corporation, as defined in Section 222 of that code, or a telephone corporation, as defined in Section 234 of that code, when the vehicle is deployed in an emergency to respond to an interruption or impending interruption of electrical, natural gas, or telephone service.