Why do some providers require IPv6 /64 PA space to have public whois?

[dougb at dougbarton.us (Doug Barton)]

On 12/10/2012 01:27 PM, Schiller, Heather A wrote:
> I think most folks would agree that, IPv4 /32 :: IPv6 /128 as IPv4 /29 :: IPv6 /64

Quite the opposite in fact. In IPv6 a /64 is roughly equivalent to a /32
in IPv4. As in, it's the smallest possible assignment that will allow an
end-user host to function under normal circumstances.

SWIP or rwhois for a /64 seems excessive to me, FWIW.

Doug