[ppml] PPML Digest, Vol 10, Issue 10
> Most importantly, I think we need to make it very explicit that there is
> no "permanent" IPv6 assignment. ARIN *must* retain the right to reclaim
> IPv6 addresses at a later date, if the user can not justify it under the
> then-current policy. I also think that allocations should be required
> to be returned to ARIN or re-justified when another organization takes
> over the IP space. IPs are not an asset to be bought and sold
> privately; they are a public trust.
This is already in 6.4.1 of the IPv6 policy.