A by-law (or bye-law) is a rule or law established by an organization or community to regulate itself, as allowed or provided for by some higher authority. The higher authority, generally a legislature or some other government body, establishes the degree of control that the by-laws may exercise. By-laws may be established by entities such as a business corporation, a neighborhood association, or depending on the jurisdiction, a municipality.
In the United Kingdom, Canada, and some Commonwealth countries, the local laws established by municipalities are referred to as by-laws because their scope is regulated by the central governments of those nations. Accordingly, a bylaw enforcement officer is the Canadian equivalent of the American Code Enforcement Officer or Municipal Regulations Enforcement Officer. In the United States, the federal government and most state governments have no direct ability to regulate the single provisions of municipal law. As a result, terms such as code, ordinance, or regulation, if not simply law are more common.
Municipal by-laws are public regulatory laws which apply in a certain area. The main difference between a by-law and a law passed by a national/federal or regional/state body is that a bylaw is made by a non-sovereign body, which derives its authority from another governing body, and can only be made on a limited range of matters. A local council or municipal government gets its power to pass laws through a law of the national or regional government which specifies what things the town or city may regulate through bylaws. It is therefore a form of delegated legislation.
Within its jurisdiction and specific to those areas mandated by the higher body, a municipal by-law is no different than any other law of the land, and can be enforced with penalties, challenged in court and must comply with other laws of the land, such as the country's constitution. Municipal bylaws are often enforcable through the public justice system, and offenders can be charged with a criminal offence for breach of a bylaw. Common bylaws include vehicle parking and stopping regulations, animal control, building and construction, licensing, noise, zoning and business regulation, and management of public recreation areas.