Schedule 3 APPROPRIATE LOCAL OR WORKING STANDARD WEIGHTS
Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below:
| Weight | | Standard of weight to be used |
| 1. METRIC EXCEPT CARAT (METRIC) WEIGHTS | Not less than 50 mg | Local standards or working standards |
| Not more than 20 mg | Local standards or working standards which fall within the prescribed limits of error relating to the equivalent local standard weight |
| 2. AVOIRDUPOIS EXCEPT WEIGHTS EXPRESSED AS MULTIPLES OR FRACTIONS OF 1/7000 lb. | | Local standards or working standards |
| 3. OUNCE TROY | | Local standards or working standards which fall within the prescribed limits of error relating to the equivalent local standard weight |
| 4. CARAT (METRIC) | | Local standards or working standards which fall within the prescribed limits of error relating to the equivalent local standard weight |
| 5. WEIGHTS EXPRESSED AS MULTIPLES OR FRACTIONS OF 1/7000 lb. | | Local standards or working standards which fall within the prescribed limits of error relating to the equivalent local standard weight |