Individual provinces and territories typically specify, generally through legislation and regulations, the specifications and types of vehicles to be used in EMS. These vehicles include ambulances, but may also include rapid response vehicles (sometimes called "fly-cars"), and specialized emergency support units, such as equipment vehicles and mass-casualty transport vehicles. Each province or territory, and also the Canadian military, has its own unique ambulance specifications. Individual provinces or territories may also specify types of mandatory equipment in those vehicles, including medical equipment.