03. The facility must be designed for easy cleaning and housekeeping. 04. Doors must open inwards and be self-closing. 05. Heating, ventilation and lighting must be adequate 6. If mechanical ventilation is provided, the airflow must be inwards. Exhaust air is discharged to the outside and should not be recirculated to any part of the building. u7. Access must be restricted to authorized persons. 8. No animals should be admitted other than those for experimental use❑3. The facility must be designed for easy cleaning and housekeeping. ❑4. Doors must open inwards and be self-closing. ❑5. Heating, ventilation and lighting must be adequate. ❑6. If mechanical ventilation is provided, the airflow must be inwards. Exhaust air is discharged to the outside and should not be recirculated to any part of the building. ❑7. Access must be restricted to authorized persons. ❑8. No animals should be admitted other than those for experimental use