I'm going to bump my topic up, because I have a relevant question. Back when I first asked about necroposting, I was told that no rules existed because the forum was new.
However, the forum has aged since, and today, I encountered a post on a four-month-old thread that was asking another question. According to jibblyj:
Have necroposting rules changed since I originally asked about them?
In fact, when I was posting this, I saw a warning that the topic was old.