Subject to any condition prescribed in this regulation, the following measuring instruments or parts thereof, as the case may be, may be used for any appropriate prescribed purpose without the user or supplier being compelled to submit the instrument to type approval in terms of section 22 or to comply with the provisions of section 24 of the Act—
| (a) | any measuring instrument, vessel or container used for determining the quantity of— |
| (i) | ingredients in a mixture of concrete; |
| (ii) | crushed stone by volume, including when coated with cement, tar or bitumen; |
| (iii) | ready-mixed concrete, ready-mixed cement mortar, ballast or building sand by volume; |
| (b) | any storage tank gauged or calibrated for the purpose of determining excise duty by measurement and calculation or by direct reading of quantity; |
| (c) | any weighing instrument supplied or used for the determination of the mass of persons or supplied for hire or reward for the sole purpose of determining the mass of babies; |
| (d) | any weighing instrument used for the grading or sizing of eggs in the shell sold or purchased by number and according to grade and size; |
| (e) | any meter used in a water supply system other than a water meter as defined in regulation 114; |
| (f) | any measuring instrument used for the grading of grain sold or purchased according to grade and mass; |
| (g) | any measuring instrument used in land and similar surveying; |
| (i) | any measuring instrument calibrated or indicating in any measurement unit other than a unit of mass, length, area or volume unless it is a measuring instrument which is calibrated in a unit of some other physical quantity and for which certification is specially prescribed by regulation; |
| (j) | any tank for use by a milk producer and provided with a graduated dipstick; |
| (k) | any industrial measuring instrument used in the monitoring and control of a manufacturing process; |
| (l) | any indicator referred to in regulation 69 which is additional to the principal indicator or indicators of a certified measuring instrument and connected to the instrument via an interface approved for such connection in terms of section 22 of the Act. |
