What it does
This instrument, the Currency (Perth Mint) Determination 2013 (No. 5), prescribes detailed technical specifications for particular coins associated with the Perth Mint under subsection 13A(1) of the Currency Act 1965. It is made by the Parliamentary Secretary to the Treasurer and dated 12 December 2013 (see the heading and signature block). The determination formally (a) names itself (s 1), (b) fixes its commencement as the day after registration (s 2), (c) records the statutory authority under subsection 13A(1) of the Currency Act 1965 (s 3), (d) defines the shorthand term Act to mean the Currency Act 1965 (s 4), and (e) sets out that, on and after commencement, each item in the Schedule specifies the standard weight, allowable variation, design and dimensions of coins of the denominations specified, or taken to be specified, in the Schedule to the Act (s 5(1)-(3)). The Schedule is in two parts: Part 1 is a large table of specifications (weights with tolerances, composition, maximum dimensions, shape, edge, obverse and reverse codes) and Part 2 explains the symbols used to describe designs and physical features.
Mechanically, the determination converts a long table of technical coin specifications into a legally made instrument under s 13A(1) of the Act and links each table item to the statutory scheme by reference to the Schedule to the Act (s 5(2)). The instrument expressly preserves other determinations under the same power, by stating it does not affect any other determination made under subsection 13A(1) (s 5(4)). Part 2 of Schedule 1 is incorporated by s 5(3) as the authoritative explanation of the shorthand symbols used in the specification table.
The Schedule (Part 1) lists 125 numbered items. Each item records: denomination, standard composition or minimum purity, a numeric standard weight with an allowable variation in grams, a maximum diameter or dimension (in mm), maximum thickness (mm), shape code (S1 or S2), edge code (E1-E5), obverse code (O1-O18, O4-O17 etc) and reverse code (R1-R65). Part 2 decodes those S, E, O and R symbols into plain-language descriptions of shape (for example S1 = Circular, S2 = Rectangular shape), edge treatment (E1 = Continuously milled; E4/E5 specify unmilled edges with inscriptions appearing three times), obverse designs incorporating effigies and inscriptions, and a long sequence of reverse designs that record motifs, legends, mint marks and finishes (proof or bullion), and where relevant, material inserts (opal, abalone), gemstones, or micro-lettering. Section 5 together with Schedule 1 is the operative core: it defines what the determination does,fixing standardised, highly detailed specifications for the listed coins.