D.C. Mun. Regs. tit. 29, § 522
522.1 A patient picked up by a private hospital ambulance of the Emergency Ambulance Service shall be taken to the hospital concerned unless a parent or near relative at the scene of the emergency call requests that the patient be taken to a specific hospital, and at that time, assumes responsibility and signs the form provided by the Emergency Ambulance Service.
522.2 A patient picked up by a Fire Department or other District agency ambulance of the Emergency Ambulance Service shall be taken to the participating hospital nearest the emergency call unless, the individual (if adult), parent, or near relative at the scene of the emergency call requests that the patient be taken to a specific hospital, and at that time, assumes responsibility and signs the form provided by the Emergency Ambulance Service.
SOURCE: Rules of the Board of Public Welfare issued July 28, 1950; as amended on September 29, 1950.