Except as provided in §B of this regulation, a person may hunt wetland game birds only with a: Vertical bow; or Shotgun which is not larger than 10-gauge: Loaded only with shot approved by the United States Fish and Wildlife Service as nontoxic for waterfowl and coots pursuant to 50 CFR 20; and Fired from the shoulder. Persons hunting rails and snipe may use a crossbow. A person hunting wetland game birds may not possess shotgun shells loaded with: Shot that is not approved by the United States Fish and Wildlife Service as nontoxic for waterfowl and coots; or A single projectile, for example, pumpkin ball, sabot, or slug. A person hunting wetland game birds may not use or possess approved nontoxic shot larger than size “T”. A person may not hunt wetland game birds with any automatic loading or hand-operated repeating shotgun capable of holding more than three shells unless the magazine is: Cut off; or Plugged with a solid, one-piece filler which cannot be removed from the loading end; and The gun cannot hold more than three shells in the magazine and chamber combined. The restriction in §E of this regulation that limits shotguns to those holding not more than three shells does not apply to: Shotguns used for hunting snow geese during the Light Goose Conservation Order season; and Shotguns used for hunting resident Canada geese during the September resident Canada goose season.