I've already closed and archived the "DEF CON 22 Planning" forum:
https://forum.defcon.org/forumdisplay.php?f=756

It has been placed in the archive for DEF CON 22:
https://forum.defcon.org/forumdisplay.php?f=841

Soon, other forums like this one and the "Contests/Events/Villages/Social-Gatherings" forums will also be moved there.

"When," is variable, and will depend partly on activity, and an upper-limit date.