For regulation 30, the maximum permissible variation for an Inspectors' Class 3 standard of measurement is:
(a) for the measurement of mass of a denomination stated in column 1 in Schedule 9--the maximum permissible variation stated in column 7 for the denomination in that Schedule; and
(b) for the measurement of mass of a denomination not stated in column 1 in Schedule 9--the maximum permissible variation appropriate to the denomination when linear interpolation is applied to the maximum permissible variation stated in column 7 in that Schedule.