§ 78-a. Electric or battery-powered markers. 1. Any railroad using a
passenger, mail, work, or wreck train shall equip the last car of each
such train with electric markers of sufficient candle power to be
visible for a distance of three thousand feet under normal weather
conditions. Battery-powered, flashing-type, or constant burning markers
shall be deemed sufficient compliance with the foregoing requirement.

2. If, in any particular case, exemption from any of the requirements
herein is deemed necessary by the railroad concerned, the commissioner
of transportation may grant the application of such railroad, for such
exemption when accompanied by a petition setting forth the conditions
existing and the reason why such exemption is asked. Any exemption so
granted shall be limited to the particular case covered by the petition.