Document ID: chunk:federal_register_of_legislation:F2016L00538:reg:13:p3
Version: federal_register_of_legislation:F2016L00538
Segment Type: reg
Provision Reference: reg 13 (pt 3/4)
Character Range: 6661–9618

day

              *        decibel

              *        inch

              *        foot

              *        hectare

              *        ounce

              *        foot/minute

              *        degree

              *        minute

              *        second of arc

              *        radian

              *        steradian

              *        degree Celsius
         (2)      A decimal multiple or sub-multiple of kilogram must be formed by attaching a prefix to gram.
Note   For historical reasons, kilogram already contains a prefix.
      11                        Australian legal units of measurement that may only be combined with prefixes that form multiples of the unit
  Tonne may be combined only with an SI Prefix that gives a decimal multiple of tonne.
Example   kilotonne, but not millitonne.
      12                        Combination of a prescribed SI prefix with a combination of Australian legal units of measurement
  An Australian legal unit of measurement may be formed from a combination of Australian legal units of measurement under section 8 of these Guidelines and the use of an SI Prefix.
Example   speed (km/h):
Metre and hour are Australian legal units of measurement: see subsection 3 (1) of the Act, definition of Australian legal unit of measurement, para (a) and Sch 1 of the Regulations.
Metre and hour may be combined to form the Australian legal unit of measurement metre per hour (m/h): see subsection 3 (1) of the Act, definition of Australian legal unit of measurement, para (b).
Metre per hour may be further combined with the SI Prefix kilo (k) to form the Australian legal unit of measurement kilometre per hour (km/h): see subs 3 (1) of the Act, definition of Australian legal unit of measurement, paragraph (b).
      13                        Expression of Australian legal units of measurement
         (1)      Names and symbols of Australian legal units of measurement must not be used together in the same expression.
Example   km/h, but not kilometre/h.
         (2)      An adjective or sign must not be added to the name or symbol of an Australian legal unit of measurement.
Example   Wa cannot be used as the unit of acoustic power.
         (3)      The symbol for an SI Prefix must be placed immediately before the symbol of the Australian legal unit of measurement to which it refers, without an intermediate space.
         Examples
         1   milliwatt: mW
         2   kilometre: km
         3   gigatonne: Gt
         4   megajoule: MJ
         (4)      For a decimal multiple or submultiple of an Australian unit of measurement that is expressed as a fraction, an SI prefix:
            (a)   may precede the Australian legal unit of measurement in the numerator or the denominator, or both if there is no other way to form an unambiguous expression; and
            (b)   should precede the Australian legal unit of measurement in the numerator.
Examples