Idaho Code § 61-515A: Safety and sanitary equipment and conditions.

Every person operating a common carrier railroad in this state shall equip each locomotive and caboose used in train or a yard switching service and every car used in passenger service with a first aid kit of a type approved by the commission, which kit shall be plainly marked and be readily visible and accessible and be maintained in a fully equipped condition.

Each locomotive, caboose and change room shall be furnished with sanitary cups and sanitary ice-cooled or refrigerated drinking water.

Each locomotive, caboose and change room shall be maintained in a safe and sanitary condition at all times.

For the purpose of this section a "locomotive" shall include all railroad engines propelled by any form of energy and used in rail line haul or yard switching service.