No, I saw in the Q&A that it is allowed. It's up to members to enforce the transfers though.
I'd still say that you should be wary, as if you are trading RSGP from one account but receiving 07GP on another, what is to stop Jagex from interpreting this as RWT? I don't think their systems are truly that smart.
Well they shouldnt, as it was stated (Like in the post above) by a Jmod that there is no rule against it.

