As per the discussion between Wilfried and Scott, this is a significantly different proposal than the one that we have achieved consensus on.
ARIN has a MAY here, both for recovery and return-to-IANA.
RIPE has a MUST here (it's still a "may" regarding recovery, but as soon as it is recovered, it MUST be returned to IANA).
We'll definitely have to discuss this at the WG meeting next week, and I'm afraid that this proposal will have to do another round through the policy processes to achieve identical wording - otherwise it can't be a global policy.
There appears to be a certain amount of doubt as to whether the wording has to be identical or merely substantially the same (but I agree with Gert that this, on the face of it, is a substantially different policy). Note however that ARIN is the odd man out here. All the other RIRs have agreed on the original wording, so it may not be up to *us* to do anything. Nigel