[address-policy-wg] Policy/practice on holding back space before reallocation?

I have not been able to find this info on RIPE's website.  Does anyone
know the amount of time RIPE holds back a 'deregistered number
resource' before allocating it?

I found this document that describes the deregistration process for a
resource holder:  https://www.ripe.net/ripe/docs/ripe-517   In general
it gives the resource holder 4 weeks to object and 3 months to
remediate.  It does not describe how long RIPE will hold back
deregistered IP's before allocating them out again.

For example, ARIN used to hold back for one year.. they recently
announced they were preparing to drop from 6 months hold to 3 months
hold - here is the announcement:
https://www.arin.net/announcements/2012/20120717.html   It's way down
3rd paragraph from the end.

"One last change relates to the amount of time that ARIN will hold
recovered IPv4 resources prior to reissuance. The hold time for all
returned, reclaimed and revoked IPv4 resources will be reduced from
six to three months."

Does RIPE have a similar practice.

 Thanks,
--Heather