In order to honor the veterans of this state and encourage the use of natural parks across Tennessee, the division of parks and recreation shall designate one (1) day per year during which access to and use of all state parks, including, but not limited to, campgrounds and golf courses, shall be free of charge for all veterans. Each veteran shall be required to show proof of veteran status, which may include, but is not limited to, a DD Form 214 or other comparable certificate of discharge from the armed forces, prior to being granted free admission to any state park.