Breed Specific Legislation (BSL) are laws against the ownership of specific breeds, mostly targeting the group of dogs commonly referred to as "Pit Bulls". All dogs of a specified breed are considered dangerous/illegal regardless of temperament, training, and disposition of the individual dog. Often, even dogs that have "characteristics" of the specified breeds are included in these laws as well, so even if your dog is not one of the breeds listed it may still be in danger of confiscation and euthanasia simply based on the dog's appearance.
For more information and resources on Breed Specific Legislation, check out our links page.