Hello Nick,
Someone suggested to include such documentation in IPv6 PI requests. Because this is not actually a policy change (it doesn't change if someone gets the address space or not) but an implementation issue we decided to add it as a note to the RIPE NCC.
I certainly suggested it as a policy possibility:
http://www.ripe.net/ripe/maillists/archives/address-policy-wg/2011/msg00820....
Not sure if others talked about it too.
However, there is a substantial difference between "explicitly required to provide evidence" and "to ask for extensive documentation" - the former was suggested because it does materially change the policy.
I know, but that would change the IPv6 PI policy into a judgement call by an IPRA. That would make the policy unimplementable. The information would still be interesting though, which is why I suggest to the RIPE NCC that they ask for it anyway. It's just a suggestion. We don't tell the NCC how to implement policy, but we can suggest :-) Thanks, Sander