The recommendation is in a wiki article[1] (in the form of an OSSN document), so can be freely edited. But if someone makes significant updates to the recommendation then we should probably also send an errata announcement to the openstack-announce and openstack-discuss mailing lists detailing what's changed since initial publication. The OSSN process[2] doesn't mandate any particular errata steps, but we can use our own judgement to determine what may be additionally worth announcing/updating for it.
Cool, thanks. I think the recommendation is "review and reconsider the default policy for this feature" and "here is what we think is a good default if you don't otherwise know". Changing our recommended default to be a more generally-applicable doesn't seem to alter the general message to me, so I'd tend think just editing the wiki page is fine. --Dan