(a) the weighbridge is kept truly balanced, that the platforms are kept clean and that the space between the frame and the platforms is kept free from obstructions;
(b) measurement of a vehicle or livestock brought to the weighbridge is not refused during normal trading hours in the area unless the capacity of the weighbridge is insufficient or advance payment of the charge is required but not made;
(c) due care is exercised in determining a measurement by use of the weighbridge;
(d) entries are made in the tare mass book, and measurement tickets are completed and copies issued, with due care and in accordance with these Regulations;
(e) on demand made at the weighbridge at any reasonable time by an inspector or other interested person, there is produced the original of any measurement ticket relating to a measurement made by use of the weighbridge during the preceding 12 months; and
(f) the administering authority is informed, and the weighbridge is withdrawn from use, if the licensee knows, or has reason to believe, that a measurement made by use of the weighbridge would be incorrect.