Becoming a den chief

[Swimmer21]

Hello- I"m not sure if this is the right thread to post this in but I'll ask here.

My son wants to be his younger brother's Webelos Den chief, and also have that count for his 4 months of service

for Star Scout. He just passed his BOR for Second Class and he's very close to First Class.

Besides the den leader and Cubmaster for that den in Cub scouts, who else does he need to ask? Does he ask

our Troopmaster and his SPL? In the book, it just says "adult leader." In our troop, ASMs also can sign off rank advancement

in addition to the Troopmaster. thanks alot!