This entire conversation highlights that the laws don't say anything explicit about how the ball may be transferred between players in a maul, other than 16.2 - which
(a) refers to 'ripping' without ever defining what that means;
(b) applies to any player, hence to players from either team; and
(c) requires said ripper to stay in contact with the BC until the ball is transferred.
So unless 'ripping' is interpreted to mean *any* transfer of the ball within the maul (which would imply that any transfer requires contact between the BC and the recipient, whoever they may be - thereby ruling out long transfers to teammates during the maul), we're left to assume that non-'ripping' transfers within (or, I suppose, to outside) the maul may be done any old how (as long as they're not forward, I guess).
The laws also don't appear to say anything explicit about how participants in the maul are exempted from obstruction laws such as 9.3 when the ball is moved toward the back. It's kind of implied, but really just seems to depend on everybody just knowing that that's how a maul works.
Of course I'm happy to be contradicted in any of the above!