Section 53-09-03 - Duties of ski operators with respect to ski areasEvery ski operator shall have the following duties with respect to its operation of a skiing area:
1. To mark all trail maintenance vehicles and to furnish such vehicles with flashing or rotating lights which must be in operation whenever the vehicles are working or are in movement in the skiing area.2. To mark with a visible sign or other warning implement the location of any hydrant or similar equipment used in snowmaking operations and located on ski slopes and trails.3. To mark conspicuously the top or entrance to each slope, trail, or area with the appropriate symbol for its relative degree of difficulty and those slopes, trails, or areas which are closed, or portions of which present an unusual obstacle, must be marked at the top or entrance with appropriate symbols.4. To maintain one or more trail boards at prominent locations at each ski area displaying that area's network of ski trails and slopes with each trail and slope rated thereon in accordance with the symbols provided for in subsection 3.5. To designate by trail board or other means which trails or slopes are open or closed.6. To place, or cause to be placed, whenever snow grooming or snowmaking operations are being undertaken upon any trail or slope while such trail or slope is open to the public, a conspicuous notice to that effect at or near the top of such trail or slope.7. To post notice, at or near the boarding area for each aerial passenger tramway designed to transport passengers with skis attached to boots, of the requirements of this chapter concerning the use of ski retention devices. This obligation is the sole requirement imposed upon the ski area operator regarding the requirement for or use of ski retention devices.