In general, if it's produced by LEGO and comes in a set or can be used in a MOC, it's fair game for the tracker. There are some set adjacent items (like keychain Minifigs) that are ok as well. Articles of clothing, pens/pencils, salt/pepper shakers, luggage, etc. are not appropriate.
I'm not going to come up with a exhaustive list. It's a waste of time and will probably be incomplete or inadequate. If in doubt, ask. As always, anything submitted to the tracker should be fully formed and usable. Mockups are not allowed.
I'm not going to come up with a exhaustive list. It's a waste of time and will probably be incomplete or inadequate. If in doubt, ask. As always, anything submitted to the tracker should be fully formed and usable. Mockups are not allowed.