In these regulations Act means the Trade Measurement Act 1999 ;approved printing device means a printing device that conforms to a pattern in relation to which there is in force under the National Measurement Regulations 1999 of the Commonwealth a certificate that approves the use of the device for trade;characters includes letters, figures and symbols;main display part , in relation to a package, means (a) if the name or brand appears on the package once only, the part of the package on which it appears; or(b) if the name or brand appears on more than one part of the package with equal prominence in each case, any one of those parts; or(c) if the name or brand appears on more than one part of the package but not always with equal prominence, the part of the package on which it is more prominent or any part of the package on which it is most prominent; or(d) if the name or brand of the article in the package does not appear on the package, that part of the package which will be most prominent when the package is exposed for sale in the manner in which it is likely to be exposed for sale;measurement marking means the marking of measurement required by these regulations to be made on the package containing a pre-packed article.