An ordinance is a law created by a local government, such as a city council or county board of supervisors. Municipalities can pass ordinances on matters that the state government allows to be regulated at the local level. Ordinances can cover a variety of topics, including zoning, rental building requirements, public health and safety, noise, snow removal, pet restrictions, and building and zoning regulations, to name a few. Ordinances must generally be approved by a local assembly and promulgated by the mayor or governor of the local government in question, who may demand a second vote but may not veto the ordinance. An ordinance is considered the most authoritative form of action taken by a town council, and once adopted, the ordinance becomes an established law.