1. National Measurement Act 1960 (Cth) section 4:
Objects and application of Act
(1) The objects of this Act are:
(a) to establish a national system of units and standards of measurement of physical quantities; and
(b) to provide for the uniform use of those uniform units and standards of measurement throughout Australia; and
(c) to coordinate the operation of the national system of measurement; and
(d) to bring about the use of the metric system of measurement in Australia as the sole system of measurement; and
(e) to provide for a national system of trade measurement;
2. National Trade Measurement Regulations (Cth) 2009 section 4.11:
(1) The required measurement marking must be:
(e) in a form in which units of measurement under the metric system are ordinarily written in the English language.