structural:expansion, linguistic:paraphrasing, linguistic:voice_change, stylistic:tone
Standards

For instance, in Europe, the European Committee for Standardization publishes the standard CEN 1789, which specifies minimum compliance levels across the build of ambulance, including crash resistance, equipment levels, and exterior marking. In the United States, standards for ambulance design have existed since 1976, where the standard is published by the General Services Administration and known as KKK-A-1822. This standard has been revised several times, and is currently in version 'F' change notice #13, known as KKK-A-1822F. The National Fire Protection Association has also published a design standard, NFPA 1917, which offers an alternative to KKK-A-1822F. The Commission on Accreditation of Ambulance Services (CAAS) has published its Ground Vehicle Standard for Ambulances v2.0, effective July 2019. This standard is similar to the KKK-A-1822F and NFPA 1917–2019 specifications. The decision on which of the current (3) standards to require is left up to each individual state legislature or EMS director. Some states have no specific requirement, while others specify which standard is acceptable. Others, yet, allow the end user to decide which standard to comply to.