He can apply "Open Work Permit" if he wanted to apply PR inside Canada.
He can send an "Open Work Permit" together with his PR application BUT not before.
On CIC website right now it takes 11 months for the first step.
Normally an "Open Work Permit" arrives with or after the first step.
Please note that he can't work or can't leave Canada nearly a year.
(I've been waiting for my Open Work Permit for 10 months & 1 day now)
Good Luck.