We have recently formed an all girl Venturing Crew as part of our Troop. The adult Advisor and Assistant Advisors are YPT and VYPT trained. Assume that Crew members will not attend any Troop event without one or more Venturing leader(s) in attendance. For events that the Crew will participate in with the Troop, do all registered adult leaders of the Troop participating in the event also have to be VYPT too? Is there any BSA literature that can provide guidance?