(1) When making a weight or measurement determination as provided for by this article, a licensed bonded weighmaster shall use a weighing or measuring device that is of a type suitable for the weighing or measuring of the amount and kind of material to be weighed or measured and that has been tested and approved for use by a weights and measures officer of this state within a period of twelve (12) months immediately preceding the date of the weighing.
(2) A licensed bonded weighmaster shall not use any scale to weigh a load the value of which exceeds the nominal or rated capacity of the scale. When the gross or tare weight of any vehicle or combination of vehicles is to be determined, the weighing shall be performed upon a scale having a platform of sufficient size to accommodate such vehicle or combination of vehicles. Each separate unit shall be entirely disconnected before weighing and a separate weight certificate shall be issued for each such separate unit.