blackshoe, on 2015-April-16, 09:24, said:
The last sentence of Law 29B reads "the auction proceeds as though the opponent had not called at that turn, but Law 16D2 applies."
Another case of incomplete quotation!
Law 29B said:
Unless A applies, a call out of rotation is cancelled and the auction reverts to the player whose turn it was to call. Offender may make any legal call in proper rotation, but his side may be subject to the provisions for rectification in Law 30, 31 or 32.
and the Reference to Laws 30, 31 and 32 must not be overlooked or forgotten. The relevant Law among these always applies when a call out of rotation is cancelled according to Law 29B.
blackshoe, on 2015-April-16, 09:24, said:
According to the laws, "cancelled" means the same thing as "withdrawn" so it seems clear that dealer's RHO's bid in this case is not "cancelled". In fact, it never happened except that inferences from this bid that "never happened" are UI to the OS ("Law 16D2 applies"). Note that 16D2 applies, not 16D1, so inferences from the bid are not authorized to the NOS. If the lawmakers had wanted those inferences to be AI, the law would say "Law 16D applies".
So in this case West must pass whenever it is his turn to call. (Law 31B)
(During the auction in progress! There is a tale about a player who had received such a ruling and then consistently passed during the next three weeks - until finally someone discovered and clarified the misunderstanding.)