I believe you should be able to apply under the Partnership policy once you've done the deed and lived together for 12 months. ?
This tells you what makes an eligible sponsor and it doesn't mention having to wait until he's held PR for 2 years. ?It does state though that he shouldn't have previously been sponsored himself, otherwise he'd have to wait for 5 years before sponsoring you. ?
This sets out the requirements under the Partnership policy. ?