sentences:  The 90th Congress passed a Congressional Charter of Incorporation to designate the National Park Foundation (NPF) as the official charitable partner of the National Park Service (NPS) on December 18, 1967.Rooted in a legacy that began more than a century ago, when private citizens from all walks of life took action to establish and protect national parks, the National Park Foundation, in partnership with the National Park Service, generates private support and builds strategic partnerships to protect and enhance America's national parks for present and future generations.The NPF works in partnership with companies and organizations that wish to support the parks by delegating donations through one of foundation's programs and creating grants that honor the company's mission or values and benefit the parks and their patrons.