23 We consider that the approach to be adopted to the construction of s 17, and the part of that section relevant to the appeal, is to construe the provision by reference to the words used in it and also, of course, by reference to the definition of the expression "plant" in s 4.
24 Section 17 must of course be construed by reference to its context. The relevant context includes the provisions proximate to s 17 in the statute, namely ss 15, 16, 18, 19 and 20. Section 17, specifically s 17(1)(b), states that "each person who has, to any extent, control of any plant … 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 plant … is safe and without risks to health", effectively placing an obligation on each person who has control of the plant. Section 17 is part of a scheme of absolute liability to ensure the safety of persons at work, whether or not they are the employees of the person upon whom or which the relevant duty is placed - in some cases such as ss 15 and 16 the duty is placed on the employer - but in s 17(1)(b) the duty is placed upon each person who or entity which has control of plant used by non-employees in non-domestic premises.
25 Also of significance is s 53 of the Act, which contains statutory defences to what would otherwise be breaches of occupational health and safety. This provision also provides part of the context applicable to the construction of s 17. The 1983 statute creates defences where, if it can be proven that it was not reasonably practicable for the person to comply with the provision of the Act or the regulations the breach of which constituted the offence; or the commission of the offence was due to causes over which the person had no control and against the happening of which it was impracticable for the person to make provision. Having regard to the terms and function of s 53, there is no reason to read the provisions of ss 15 to 20, including s 17, artificially. Additional words of limitation, beyond those which it contains, are not to be read into s 17.
26 The question that thus arises is the interpretation of the expression "plant". Marks J originally relied (as does the appellant) on the judgment of the House of Lords in Haigh v Charles W Ireland Limited where the expression as used in the Factories Act 1961 (UK) was not expressly defined. This however, is not the case in the Occupational Health and Safety Act. The expression "plant", according to the statutory definition in s 4 of the Occupational Health and Safety Act is defined in this way: " 'plant' includes any machinery, equipment and appliance" (emphasis added). Generally, the use of the expression "includes" is intended to enlarge the ordinary meaning of the word: see, for example, R v Holmes Ex parte Public Service Association of New South Wales (1976) 140 CLR 63 at 73 and Sherritt Gordon Mines Ltd v FCT (1976) 10 ALR 441 at 445. It is essential that the expression be interpreted in accordance with its statutory definition and that appropriate weight be given to all of the elements of the definition. It is settled that a court construing a statutory provision must strive to give meaning to every word of the provision: Project Blue Sky Inc v Australian Broadcasting Authority (1998) 194 CLR 355 at 382.
27 We consider that when there is regard given to the words relevantly used in s 17(1)(b), the context in which the provision is to be considered (which includes the significant limitation on its scope deriving from its scope being conditioned upon the notion of "control") and the definition of "plant", the construction advanced by the appellant should be rejected.
28 If it is to be accepted that the speech of Lord Diplock in Haigh v Charles W Ireland Limited demonstrated a settled approach by the courts to the construction of the expression "plant" in 1973 that does not remove our obligation to construe the 1983 statute relevantly by reference to its plain words within the overall scheme of the Act. We do not accept that there has been any failure by the legislature to use sufficiently clear language to give a broad, or broader, meaning to the expression "plant".
29 We consider that the approach adopted by Marks J in the decisions under appeal was correct. His Honour, in finding that a breach of the statute had been made out, gave appropriate consideration to circumstances which might have obviated the charge being made out (see, for example, his Honour's conclusions and the issue of control at para [43] of the first judgment) and there was no issue taken to the penalty imposed.
30 We have concluded that the appellant has failed in its appeal against the decisions of Marks J. Similarly, we conclude that the appellant has failed to demonstrate that the earlier Full Bench decision was in error. The appeal must therefore be dismissed.
31 While we have taken a slightly different approach to that taken in the earlier Full Bench decision, we have reached the same conclusion. For the reasons earlier referred to, we considered it appropriate to give separate or independent consideration in the present appeal to the legal issues raised.