My Son got his Minors PAL in BC when they interviewed me one of the first questions asked was are you ok with your son being able to buy Ammo without you. This was the BC office I was talking to. So im not sure if you are correct
While the member is legal to buy ammo with proof of valid PAL it becomes a moot point when the Delivery Service has Stipulations as to who is allowed to sign for it.
Why worry about it (signature required) until the time comes when the courier company is knocking at your door.
Rob
Infantryman Terry J Street,2nd Battalion, PPCLI, Shilo, Man. EOT, April 4 2008 Panjwayi District Afghanistan,Constable Jimmy Ng,RCMP EOW,Sunday, September 15, 2002