There is nothing in those restrictions that says we couldn't enter the monument during normal opening times and weigh ourselves down with lead balloons - providing said balloons were attached to our hands and feet and did not come into direct contact with the monument. Nor does it restrict the bringing in of reptiles such as alligators and boa constrictors for the enlightenment and delectation of the general public - though you're right, and ordinary animals are prohibited (sorry Moss).