FILE - A Ukrainian skier heads out on the course to test skis for wax and snow conditions prior to the relay competition at the World Cup Biathlon, Saturday, Feb. 13, 2016, in Presque Isle, Maine. The on-again, off-again ban on high-end waxes that help cross country skis glide smoothly over the snow, but are toxic to your health and the environment, is on in some places, but not the cross country ski World Cup circuit or 2022 Beijing Olympics because the tester isn't ready. (AP Photo/Robert F. Bukaty, File)

FILE - A waxing technician works on a ski during the cross-country sprint competitions at the 2014 Winter Olympics, Tuesday, Feb. 11, 2014, in Krasnaya Polyana, Russia. The on-again, off-again ban on high-end waxes that help cross country skis glide smoothly over the snow, but are toxic to your health and the environment, is on in some places, but not the cross country ski World Cup circuit or 2022 Beijing Olympics because the tester isn't ready. (AP Photo/Gregorio Borgia, File)

FILE - An Estonian service technician waxes skis prior to the Women's individual 15k pursuit Cross Country race at the Vancouver 2010 Olympics in Whistler, British Columbia, Friday, Feb. 19, 2010. The on-again, off-again ban on high-end waxes that help cross country skis glide smoothly over the snow, but are toxic to your health and the environment, is on in some places, but not the cross country ski World Cup circuit or 2022 Beijing Olympics because the tester isn't ready. (AP Photo/Elaine Thompson, File)