It all depends on your circumstances. You'll need to provide a little more detail. Typically JVs are considered to be partnerships in the eyes of the law, but the rest of your questions will depend on the reasons for the JV's existence in the first place, as there are various tests (recognition characteristics) for a JV to be officially recognised, and be able to operate under certain circumstances. It wouldn't be responsible for anyone to advise you on the specifics of JVs as they differ per project or association, so precedent is not really an applicable tool in these cases.
And at the end of the day you need a lawyer to draw up the JV agreements. You should not leave it to yourself unless you have a very good background in commercial law, which I'm quite sure you don't.
Also, why a JV? Sounds like you're getting into business with another person, not another company. Or is that simply reading too much into your original post?