His Honour went on to refer to what had been said in the joint judgment in CIC Insurance Ltd v Bankstown Football Club Ltd (1997) 187 CLR 384. There, Brennan CJ, Dawson, Toohey and Gummow JJ said at 408:
"It is well settled that at common law, apart from any reliance upon s 15AB of the Acts Interpretation Act 1901 (Cth), the court may have regard to reports of law reform bodies to ascertain the mischief which a statute is intended to cure. Moreover, the modern approach to statutory interpretation (a) insists that the context be considered in the first instance, not merely at some later stage when ambiguity might be thought to arise, and (b) uses 'context' in its widest sense to include such things as the existing state of the law and the mischief which, by legitimate means such as those just mentioned, one may discern the statute was intended to remedy. Instances of general words in a statute being so constrained by their context are numerous. In particular, as McHugh JA pointed out in Isherwood v Butler Pollnow Pty Ltd (1986) 6 NSWLR 363 at 388, if the apparently plain words of a provision are read in the light of the mischief which the statute was designed to overcome and of the objects of the legislation, they may wear a very different appearance. Further, inconvenience or improbability of result may assist the court in preferring to the literal meaning an alternative construction which, by the steps identified above, is reasonably open and more closely conforms to the legislative intent."
[footnotes omitted]
40 The relevant purpose can be discerned from the structure of the Act, as well as the provisions of s10 itself.
41 In this statutory scheme, certain duties are imposed, in absolute terms. In the case of the duties imposed by ss10(1) and (2), I take the view that the terms of the duty do not appear in those subsections alone, but can only be ascertained from all of the provisions made in the section, in their entirety.
42 Some examples illustrate why that conclusion is unavoidable. Subsection 10(4) can not be read as containing matters for a defendant to raise, as the prosecution submitted. Rather, it explains the meaning of the word 'control', used in s10(1). As Brennan J described it in Chubb, the provisions of s10(4) prescribe the measure of precautions which must be taken by certain people. They include those who only have limited control of premises, plant or substances and those who have obligations to maintain or repair premises, plant or substances under a contract or lease.
43 Furthermore, the absolute duty imposed by s10(1), to ensure that premises are safe and without risk to health, does not fall upon all of those who have such control of premises, for example. The duty in that case only arises when a person has control of premises which are used as a place of work, by those who are not that person's employees (s10(3)(a)). It is only when that duty, as imposed, is breached, that an offence is committed under s12 of the Act. What level of control is sufficient, appears from s10(4)(a).
44 In my view, it follows that it cannot be concluded that what appears in ss10(3) and (4) is to be understood as exceptions or qualifications to general duties imposed by ss10(1) and (2). They are rather essential aspects of the duties themselves, which fall to a prosecutor to demonstrate. Were it to be concluded otherwise, curious consequences would follow.
45 On the prosecution's approach, in the case of an offence committed at a point of access to or exit from a place of work (s10(3)(c)) for example, that aspect of the offence would not be one which the prosecutor would be obliged to raise in the charge, or prove at trial, as a legal element of the offence, or perhaps even as a factual ingredient. This would follow, even though the means of access to, or exit from, a place of work is neither encompassed in the phrase 'place of work', or the word 'premises', which appear in s10(1). These are both defined terms. If there were an issue as to whether a risk to safety had arisen at, or beyond a point of access to or egress from a place of work in a particular case, the issue would be one for the defendant to raise in the proceedings.
46 There is obvious difficulty with such an approach. The issue which a defendant would be so raising, would concern whether, in the circumstances, the defendant had any relevant duty under the Act at all. If the risk in question had arisen beyond the point of access to or exit from the place of work, there could have been no offence committed. Nevertheless, on the prosecutor's approach, this would not be a matter in respect of which it had any onus at all. The onus would fall entirely on the defendant, to establish that it had no duty in the particular circumstances and had therefore committed no offence. I am unable to conclude that this reflects a proper construction of the statutory scheme, as it would involve an obvious reversal of the usual criminal onus.
47 It would also be contrary to the approach adopted in the Act in the defences established by s28. Those defences impose an onus on the defendant which only arises, if the prosecution has established the breach alleged (see ABB Power Transmission Pty Ltd v WorkCover Authority (New South Wales) (Inspector Wilson) (unreported, Fisher P, Bauer and Hungerford JJ, CT96/1215, 2 May 1997 at p8)).
48 A comparison between s10 and s17 of the Occupational Health and Safety Act 1983, its successor, also lends support to this conclusion. Section 17 provided:
17 Persons in control of workplaces, plants and substances used by non-employees to ensure health and safety
(1) Each person who has, to any extent, control of:
(a) non-domestic premises which have been made available to persons (not being the person's employees) as a place of work, or the means of access thereto or egress therefrom, or
(b) any plant or substance in any non-domestic premises which has been provided for the use or operation of persons at work (not being the person's employees),
shall ensure that the premises, the means of access thereto or egress therefrom or the plant or substance, as the case may be, are or is safe and without risks to health.
Maximum penalty: 5,000 penalty units in the case of a corporation or 500 penalty units in any other case.
(2) Where a person has, by virtue of any contract or lease, an obligation of any extent in relation to:
(a) the maintenance or repair of any premises referred to in subsection (1) (a) or any means of access thereto or egress therefrom, or
(b) the safety of, or the absence of risks to health arising from, any plant or substance referred to in subsection (1) (b),
that person shall be treated, for the purposes of subsection (1), as being a person who has control of the thing to which the person's obligation extends.
(3) A reference in this section to a person having control of any thing is a reference to a person having control of the thing in connection with the carrying on by the person of a trade, business or other undertaking (whether for profit or not).
49 I am unable to conclude from the way in which the section has been re-arranged in the OHS Act, that there was a legislative intent to remove from the prosecution the obligation to prove as legal elements of the offences provided, the matters contained in the former s17, which now appear in ss10(3) and (4).
50 So seen, it follows that a charge brought in respect of an alleged breach of s10 must specify what duty the defendant is alleged to have breached. The prosecution must prove all legal elements of the offence so specified, including those elements which flow from the provisions of ss10(3) or (4).
51 In this case, the charge does not specify that the defendant is alleged to have controlled the plant in question in the course of a trade, business or undertaking (s10(3)). That is an essential legal element of the offence which must be proven by the prosecutor. The prosecutor accepted, correctly as I have noted, that a failure to specify such a legal element in the charge is not curable.