So that the king may have those [fees] deriving from the use of his weigh-beam in the city, no comburgess or anyone else in the city may, in a private place to avoid use of the beam, buy or sell wholesale, nor may anyone other than a comburgess buy retail, any merchandize which ought to be weighed on the king's beam. Nothing is exempt from this – not wool, nor onions, nor any goods sold by weight which ought to be weighed there, under penalty of confiscation of the merchandize. The troner may also use, in addition to the beam, balances and weights conforming to the king's standard.

[Most towns of any size seem to have been equipped with a "tron", a weigh-beam, which was intended to provide an honest and reliable device for measuring large volumes of merchandize; an official known as a troner or tronager was in charge of this task. The tolls (tronage) he charged for use of the beam were, in Norwich, one of the revenues that went towards the fee farm.]