Hi All,
A new version of the Community Standards has been posted to the forums, please read at your leisure.
The primary change is an addition to the Mature sims and is listed here:
Objects that would not be permitted on PG sims and are persistent (remain in world for sale/viewing/use when the owner/creator is no longer online) must be on private property and not be visible outside the property.
To clarify: if you are on a Mature sim, and you have an object that is not allowable on a PG sim, you must be either be in-world while the objects has been rezzed, or the object must be indoors and not visible to the casual user.
Best Wishes,
-Linden Lab