Should be the same rules, that's one of the upsides of corporate personhood it just slots corps into the same legal hole (except you know for the whole complete inability to really punish them effectively, but that's another topic entirely) as people so there's no human authorship to assign a copyright for. It doesn't/shouldn't matter who the applier is the work itself is simple non-copyrightable. Until we have some kind of personhood for digital minds/consciousnesses or someone with enough money gets the law changed AI art is in the wind IP wise.
Personally I'm all for that, too many things have the idea of ownership applied too broadly.
Personally I'm all for that, too many things have the idea of ownership applied too broadly.