Under the new system, both Emergency Care Technicians and Emergency Care Practitioners are permitted considerable latitude with respect to independent practice. Standing orders or protocols do exist, and consultation with a physician (particularly for all levels of qualifications) is an option, but for the most part the ECP, CCA, and ECT (6) functions as a fully independent practitioner, similar to the Paramedic Practitioners in the UK. Protocols are currently as of 2016, being referred to and replaced by: Clinical Practice Guidelines; and will thus phase out the terminology of "protocols"  Currently, ambulances are staffed by the BLS and ILS practitioners, usually working paired together (BAA & AEA). In many volunteer services however, a crew of two BAAs is not uncommon. The ALS providers (CCA) normally work on rapid response vehicles to improve response times. CCAs are required to be dispatched in support of the ambulance crew to all Priority 1 (Code Red) patients (those with high-acuity conditions or injuries). The national objective is to have one staffed emergency ambulance for every 10,000 population by 2010; however, in some parts of the country this ratio is currently approximately 1 ambulance for every 30,000. The vehicles used by EMS in South Africa can vary greatly across a broad range. They may be large or small, new or quite old, often driven by local economics. There is no specific current standard for ambulance design in South Africa. Some vehicles comply with either the European standard CEN 1789 or the US standard, KKK-1822, but many meet neither standard. There are even examples of motorcycles with stretcher-carrying sidecars. There is currently a major initiative underway by the government of South Africa to replace much of the aging fleet with new high standard emergency ambulances. Plans call for the replacement of approximately 450 ambulances by 2010. In the past, EMS dispatch has occurred from a variety of sources, and in many cases, has involved self-dispatch, which the currently operating private companies still do. The evolution of EMS is a national priority, and the government has created a National Emergency Medical Service Strategic Framework, complete with goals and timelines. The current objective calls for centralised dispatch to be available from at least two call centres, located in major centres, in each South African province by 2010. A national emergency telephone number for EMS has been established. This number is 10–177. There are currently no official "response time" standards in the South African system.