Rank Shuffle question

In the pack/cm guidebook...let me see if i can find the section that i was looking at. One sec....here...



Ranks should be shuffled regularly. We recommended weekly or bi-weekly rank shuffles. It is up to Pack Managers to decide how ranks will be shuffled, but as a starting point, most packs rank based on activity. To help with this, in the Pack dropdown under Manage Ranks, pack leaders can see the the number of new posts and new threads made by each member in the past seven days (or the time period specified under Manage Options). Pack leaders can decide if ranks can be challenged for and how, or what other factors may be considered toward ranking.