To add on to what Divechick said. Here is what the Guide to Safe Scouting says on diving:
The use of scuba is not authorized for a BSA unit, except so that registered Boy Scout youth and leaders may participate in the Scuba BSA program conducted by a certified dive instructor in compliance with this policy. Scuba BSA is not a diver certification program.
Scuba training programs may be a part of troop/team activities for participants who are 14 years of age or older. Members who meet the age requirement and are properly certified may participate in group dives under the supervision of a responsible adult who is currently certified as a dive master, assistant instructor, or any higher rating from NAUI, PADI, or SSI. Student divers must be under the supervision of a currently certified NAUI, PADI, or SSI instructor. No exceptions to the BSA age requirement are permitted. Scouts with a junior diver certification may dive only when accompanied by a buddy who is a certified open-water diver at least 18 years old.
Venturers
Scuba programs may be a part of Venturing activities for participants who are 14 years of age or older. Members who meet the age requirement and are properly certified may participate in group dives under the supervision of a responsible adult who is currently certified as a dive master, assistant instructor, or any higher rating from NAUI, PADI, or SSI. Student divers must be under the supervision of a currently certified NAUI, PADI, or SSI instructor. No exceptions to the BSA age requirement are permitted.
Kevin