It helps if one is something of a pedant. (I can say that since I am the "charter member" of the group...) ;-)

Seriously, according to our usergroup,

The pedagogues are those brave souls who have decided to focus on teaching others through managing the tutorials section.

demerphq has stated (and I totally agree) that "the purpose of pedagogues is to aggregate, edit and commission" Tutorials.

So, a desire to help with such is the primary prerequisite. I don't know if any formal guidelines such as a minimum rank have been established, although I would probably say that the minimums required to join other groups are probably a pretty good threshold. Other than that... humbly petition one of the gods. :-)

HTH,