Thanks for asking. For the most part, we just expect you to use common sense.
No source posts, of course. I'll let one of the A mods spell that out because there are subtleties involved that I frankly do not want to know about.
We sell advertising space. A Platinum member will get more slack than a free one, but if you're competing with one of our sponsors, you need to talk to Big Rick and work out something. It may be to your advantage to do a formal deal rather than just pop it into your signature.
Nudity needs to stay in the appropriate "Pictures of" board. (Avatars and signatures appear in all forums, and it's rude to choose material that would force other members to turn those off.) If someone chooses to visit Pictures of Women, that's different, but the naked pics should not follow that person into Chat. Contest pics and so forth on the A board should represent what you might see at a contest -- posedowns don't involve full-frontal male nudity and gaping orifices, right? Right.
Hate speech, inciting race hatred, advocating genocide or political assassination -- those are all no-brainers, right? We don't do that here.
If something is a minor problem, it'll go away quietly. Note that I don't usually PM someone about that sort of thing, because I see no reason to "rub your nose in it." If a certain kind of thread always disappears, it's safe to assume that the next one will, too. Eventually, the people who post that sort of thread either get the idea or go away.
If it's a bigger problem, you'll hear from a mod or admin. Unless someone is going out of his way to be a pain in the tush, that should settle it. No big deal. Okay?