Here are some Canadian Laws. The Preso Canario is listed in one of them and is banned.
Vancouver
Vicious Dog bylaw (passed 1987) defines a vicious dog as any with a known propensity to attack a person or animal or that has attacked without provocation. Pit bulls are automatically considered vicious.
Coquitlam
Animal Control bylaw designates pit bulls and bull terriers as vicious.
Surrey
Dog Responsibility bylaw (passed May 1, 2000), defines dangerous dogs as those that have pursued, bitten, attacked or injured without provocation. Any dog running at large is considered potentially dangerous. Owners pay higher licence fees and fines, and must purchase liability insurance.
Nanaimo, Maple Ridge
Have vicious dog bylaws that are not breed-specific.
Alberta Edmonton
Community has enacted a Vicious Dog bylaw and restriction on pit bulls. Licence fees and fines for these dogs are higher, and owners must take out liability insurance.
Calgary
Dangerous Dog bylaw means owners with dogs designated dangerous pay higher licence fees and higher fines.
Brooks, St. Paul, Wainwright, Chestermere, Stony Plain, County of Newell, Sexsmith
Municipalities have dangerous dog bylaws.
Saskatchewan Province-wide
Saskatchewan has enacted Canada's only province wide Dangerous Dog legislation. Sentencing is costliest there, with a $10,000 fine and/or six months' imprisonment for any of the following:
A dog that has attacked, bitten, injured or killed without provocation
Owner not respecting court orders for keeping a dangerous dog
Dog owned for the purpose of fighting or encouraging a dog to make unprovoked attacks on people or domestic animals
Manitoba Winnipeg
Banned pit bulls in 1990.
Macdonald
Banned pit bulls.
Thompson
Has a Dangerous Dog bylaw.
Ontario Kitchener and Waterloo
Both communities have Dangerous Dog bylaws and have banned pit bulls. To ban a type of dog, they needed to have a private member's bill passed in Ontario legislature. Ban does not include bull terrier or English bull terrier.
Lakeshore
Dangerous Dog bylaw prohibits the ownership of "any dog of the Presa Canario, Pit Bull, Staffordshire, Bull Terrier, American Pit Bull, or American Staffordshire Terrier" or any hybrid or similar crossbreed.
Vaughan, Midland, Laurentian Valley Township, Grimsby, Pelham, Bonnechere Valley Township, Killaloe, Hogarty and Richards, Cambridge, Ingersoll, Mariposa, Mississauga
Have a Vicious or Dangerous Dog bylaw or references to vicious dogs in existing bylaws.