Special Regulations; Areas of the National Park System; Yellowstone National Park; Winter Use

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The National Park Service is promulgating this rule to establish a management framework that allows the public to experience the unique winter resources and values at Yellowstone National Park. This rule includes provisions that allow greater flexibility for commercial tour operators, provide mechanisms to make the park cleaner and quieter than what has been allowed during the previous four winter seasons, reward oversnow vehicle innovations and technologies, and allow increases in visitation. It also requires snowmobiles and snowcoaches operating in the park to meet air and sound emission requirements and be accompanied by a guide.