Ambulance room requirements for large establishments mandate qualified medical staff, emergency equipment, and continuous emergency readiness. Employers of factories, mines, and building or other construction work ordinarily employing more than 500 workers must maintain a suitable ambulance room or dispensary, with prescribed equipment, privacy, emergency lighting, communication facilities, and drenching shower points where necessary. The ambulance room must be under a full-time qualified medical practitioner directly appointed by the employer and assisted by adequate paramedical staff, including at least one nurse and one General Duty Assistant-Healthcare or Nursing Assistant. The nurse must be registered and BLS-trained, with emergency experience, and the medical practitioner must meet the prescribed qualification requirements.