The only thing with powder is you'll need a pal when it passes so that sucks for guys who don't have one and only shoot antiques... I think possesion of it will still be legal without a pal though.
I read the proposed regs I don't see anything about retailer requiring pal, it just mentions government approved photo id. I wonder if you are confusing their references to licensed individuals(i.e.NRCAN license for manufacturing, retail, distribution, etc.) with PAL?
as taken from the new reg proposal
"Identification
294. (1) Before selling propellant powder to a buyer, the seller must require the buyer to establish their identity by providing
(a) a piece of identification issued by the Government of Canada, or a provincial, municipal or foreign government, that bears a photograph of the buyer, or
(b) two pieces of identification, each of which sets out the buyer’s name, at least one of which is issued by the Government of Canada or a provincial, municipal or foreign government and at least one of which sets out the buyer’s address.
Verification of identity
(2) If the buyer provides a piece of identification that bears a photograph, the seller must ensure, before selling the propellant powder, that the photograph is that of the buyer."