I would advise everyone to be very careful about allowing an organization to arbitrarily define something as "implementation" or "management practice" rather than "policy," especially when such a unilateral redefinition allows important processes and public input to be bypassed. --MM
-----Original Message-----
Geoff Huston's report states that: "At the time IANA reaches the last 5 /8s (the "IANA Exhaustion time" as defined by current address allocation policies), these unassigned addresses in the legacy /8s are then distributed evenly to the RIRs." I am not sure where this information came from though, since this is not spelled out in the "Allocation of the Remaining IPv4 Address Space" policy (http://www.icann.org/en/general/allocation-remaining-ipv4-space.htm) as far as I can discern.
This is presumably an address management practice agreed by the NRO rather than a matter of policy.
Regards,
Leo Vegoda=