The Species At Risk designation appears to be largely toothless.  You can hunt them with a fishing licence.  I'm surprised to see them on the list as I often see them while tripping.

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NOTE: It is illegal to harvest bullfrogs or turtles in
provincial parks or Crown Game Preserves.

Snapping turtles and bullfrogs may be taken under the
authority of a valid sport or conservation fishing licence.
No commercial harvest of snapping turtles or bullfrogs is
permitted. You may only take snapping turtles by box or
funnel traps or by your bare hands. You may not remove
the upper shell from any snapping turtle until immediately
before it is prepared for consumption.