Where do you see that?
https://www.fs.usda.gov/detail/psicc...id=fsm9_032556
"Camping
Camping is allowed throughout the District in both developed and undeveloped sites.
There is a 14-day stay limit anywhere in the Forest; vehicles MUST be parked in established sites.
You may camp outside of developed campgrounds if you do not cause any resource damage, and keep your vehicle within one vehicles length of main roads.
Use picnic sites, swimming beaches, and other day use areas only between the hours of 6 am and 10 pm.
Campgrounds and other recreation sites can be used only for recreation purposes. Permanent use of use as a principal residence without authorization is not allowed.
In campgrounds, camp only in those places specifically marked or provided.
At least one person must occupy a camping area during the first night after camping equipment has been set up, unless permission has otherwise been granted by the Forest Ranger.
Do not leave camping equipment unattended for more than 24 hours without permission from the Forest Ranger. The Federal Government is not responsible for any loss or damage to personal property.
Remove all personal property and trash when leaving.: