Looks like he has to be at least a 1/2 KM upstream from the river, fishing only May 15 to Mar. 31, Walleye over 50 cm and keeping no more than 3.
From:
http://www.albertaregulations.ca/fishingregs/pp2.html
A. For Streams listed and fish species listed under “PP2 Lake and Stream Listings” starting on this page.
You must follow the regulations stated with each listing.
B. For other PP2 Streams, and tributaries, not included under (A) and for fish species not mentioned at a listed stream.
May 15 to Mar. 31 – Walleye and Sauger limit 3; Walleye over 50 cm; Pike limit 3 over 63 cm; (where present, Trout limit 2; Mountain Whitefish limit 5 over 30 cm; Perch limit 15; Lake Whitefish limit 10; Burbot limit 2 (Burbot limit 0 - Feb. 1 to Mar. 31); Goldeye limit 10); Bait allowed.
Apr. 1 to May 14 – CLOSED
PP2 Lake and Stream Listings
North Saskatchewan River
upstream of Highway 22/39 (Drayton Valley) – see Fish Management Zone 1, Watershed Unit ES2.
from Highway 22/39 (Drayton Valley) downstream to the Alberta/Saskatchewan border
River Only
Open all year – Mountain Whitefish limit 5 over 30 cm; Walleye limit 0; Sauger limit 3 (Sauger limit 0 from Apr. 1 to May 14); Pike limit 1 over 63 cm; Burbot limit 10; Goldeye limit 10; Lake Sturgeon limit 0.
tributaries (excluding Sturgeon River; see also Redwater River in NB1)
Apr. 1 to May 14 – CLOSED
May 15 to Mar. 31 – Open (
Walleye limit 0 for portions within 500 m of main stem)