Necroposting policy

I know one of the ideas behind this site is to not have a lot of rules, but I think it’d be beneficial to spell out a particular policy for necro-ing threads. If I’m not told what is or isn’t acceptable, I’m just going to go with my gut, which is that it feels kinda weird to post in something more than like, a month old - considering how small the forum population is currently, that’s probably excessive and probably not what you want at all.