"™Breed-specific legislation (BSL), also referred to as breed-discriminatory legislation (BDL), is a law or ordinance that prohibits or restricts the keeping of dogs of specific breeds, dogs presumed to be specific breeds, mixes of specific breeds, and/or dogs presumed to be mixes of one or more of those breeds. The most drastic form of BSL is a complete ban; but BSL also includes any laws or governmental regulations that impose separate requirements or limitations, including but not limited to: mandatory spay-neuter, mandatory muzzling, liability insurance requirements, special licensing and additional fees, mandatory microchipping or tattoos, owner / walker age requirements, property posting requirements, confinement and leash requirements, breed-specific pet limits, sale or transfer notification requirements, restrictions on access to certain public spaces with the dog [e.g.: public parks, school grounds], required town-issued items [e.g.: fluorescent collar; vest], training requirements, requirement that photos of the dog and/or owner be kept on town file. BSL, in all of its forms, results in the destruction of many pet dogs."

-American Canine Research Council