sentences:  National clinical standards exist for all ambulance staff, written by the Joint Royal Colleges Ambulance Liaison Committee (JRCALC).The body is made up of representatives from a number of medical, nursing, allied health professional and ambulance committees.JRCALC publishes guidance based on the principles of evidence-based medicine and best practice, but compliance with JRCALC is based on the employing organisations and an individuals' judgement.