General common sense- no littering, no gum, no climbing, respectful demeanor, no drugs, etc.
unfortunately, NO SILENT RAVES!!!! me and my friends were silently dancing quite peacefully one night, and we got kicked out. otherwise, imean it s kinda obvious. Just don t bother people.
Basically the same rules as any other US National Park. You also can t climb on the statue of Thomas Jefferson. What is it you wanted to do?
What others said. It s free; you can come any time. Just be respectful and act appropriately. A few details at the official site: http://www.nps.gov/thje/planyourvisit/in��
Respect no touching just general every day common sense.