Here is a familiar scenario:
Some dojo's have a sho-dan turn-around time (white->black belt) of 5 years or less.
Someone trains in an art for 5 years, then decides to open their own dojo as ni-dan.

After having students for 5 years, they promote their first round of black-belts in their new dojo. since the students can never get promoted to the same rank as their sensei, what happens?
do the students change schools? or does the sensei promote him/her self to stay ahead in rank of the student?

or is another option for the sensei to join a membership to a organisation that sees to it that you will always be promoted ahead of your students...provided your dues are paid.

anyone see a problem with any/all of these options?