(a) Each ski area operator shall maintain a sign system with information for the instruction of passengers and skiers. Signs must be in English and visible in conditions of ordinary visibility and, where applicable, lighted for nighttime passengers. Without limitation, the signs shall be posted:

(1) At or near the loading point of each passenger tramway, regardless of the type, advising all persons that if they are not familiar with the operation of the device, they must ask the operator of the device for assistance and instructions and that they must understand such instructions before they attempt to use the passenger tramway; and

(2) At or near the boarding area of each lift, setting forth the warning regarding inherent dangers and risks and duties as provided in this chapter.

(b) The ski area operator, before opening a passenger tramway to the public each day, shall inspect the passenger tramway for the presence and visibility of all required signs.

(c) The ski area operator shall post a sign visible to skiers who are proceeding to the uphill loading point of each base area lift which shall depict and explain the following signs and symbols that a skier may encounter at the ski area:

(1) A green circle and the word "easier" designating the ski area's least difficult trails and slopes;

(2) A blue square and the words "more difficult" designating the ski area's trails and slopes that have a degree of difficulty that lies between the least difficult and most difficult trails and slopes;

(3) A black diamond and the words "most difficult" designating the ski area's most difficult trails and slopes;

(4) Two black diamonds and the words "most difficult" designating a slope or trail which meets the description of "most difficult" but which is particularly challenging; and

(5) Crossed poles or other images clearly indicating that a trail or slope is closed and may not be used by skiers.

(d) If applicable, a warning sign shall be placed at or near the loading point of a passenger tramway indicating that it provides access to only "most difficult" or "more difficult" slopes or trails.

(e) The ski area operator shall place a sign at or near the beginning of each trail or slope indicating the relative degree of difficulty of that particular trail or slope.