Get your council's policy.
The requirement is for two registerred adults or one registered adult and a parent. One registerred adult must have YPT. Nowhere does it say that both adults must be from the same troop so.......
1 Registerred Adult from Troop 1 with YPT
1 Registerred Adult from Troop 2 with YPT
Both troops provide their own leader with YPT and the second adult is coverred by the other troop.
We once had a new troop use a commissioner as the second leader. 1st meeting Monday, 1st Camporee Friday. Ir you aint outing you aint Scouting.
MBC, Cochise District, Catalina Council, Sierra Vista, AZ