I'm going to look into this a little more, but I think what you are looking at is the climbing rules for District and Council climbing activities. BSA Climbing instructor is a two weekend course. It has changed a little (I assume for the better) over the last couple years. Unfortunatly I've let my Climbing Instructor cert laps and am not up to date right now.
However, that being said, it sounds like you are running a Unit (Ventirng Crew or Troop) climbing / rappeling activity. Here's the quote for that out of the Guide to Safe Scouting:
BSA units that want to conduct their own bouldering, climbing, rappelling, or other related climbing activities must follow the requirements set forth in Climb On Safely.
The Eight Points of Climb On Safely:
I do strongly suggest that every adult participating take the "Climb On Safely" course. It is an on line course and will take about 20 minutes. It can be found on the National site at www.scouting.org
I'd be very interested in hearing how this goes. I'll be doing some of this with my Crew, too.