[dns-wg] ripe policy about reverse dns?

Hello,

I tend to remember that RIPE had a strict policy about delegated address
space reverse DNS: adresses must have a valid reverse and delegated (sub)
blocks must be registered in RIPE db. I wanted to refer to the document
mentioning these requirements but I was not able to find them. 

Navigating on www.ripe.net helped nothing: reverse dns part shows the
procedure, refers to a page "about ripe policies" which contains only links
to RFC and other RIPE documents, which in turn are about the procedure and
not any policy. Maybe there are any hidden one mentioning that "you should
have reverse on your addresses" but I kindly ask your help where to look for
it.

If this requirement would have been dropped then I'd be extremely happy to
know about it.

Thank you,
Peter

ps: Reason is a(nother) big provider with many /19 and with no reverse or
RIPE entry (other than the /19) whatsoever, and occasional spam from these
reverseless and nameless blocks.