87 In Stevens v Brodribb Brennan J referred to circumstances which may make it necessary for the principal to retain and exercise a supervisory role, as a matter distinct from prescribing the respective areas of responsibility if confusion about those areas involves a risk of injury. The basic principle remains, however, that the principal has no duty to retain control of the system of work if it is reasonable to engage the services of an independent contractor who is competent to control the system of work without supervision, and the activity has been organised and has been placed in the hands of the independent contractor.
88 The circumstances to which Brennan J referred were not elaborated. Subsequent cases have explored the circumstances, but Leighton v Fox stands against arriving at "a general law obligation … of a more extensive kind than that recognised in Stevens v Brodribb Sawmilling Co Pty Ltd" (at [59]).
89 In a number of decisions of this Court, it has been held that a principal owes to an independent contractor, or to the independent contractor's employee, a duty beyond the alleviation of risk of injury arising from a need for direction and co-ordination of activities on a site. Examples are Rockdale Beef Pty Limited v Carey [2003] NSWCA 132 (the configuration of the principal's work site brought the safety risk; see also the protruding scaffolding in Erect Safe Scaffolding (Australia) Pty Ltd v Sutton [2008] NSWCA 114; 173 IR 412, although there was also a failure in coordination of activities); Tolhurst v Cleary Bros (Bombo) Pty Ltd [2008] NSWCA 181 (the principal created the conditions in which there was a risk in the system of work and retained control over it); Bostik Australia Pty Ltd v Liddiard [2009] NSWCA 167 (the principal exercised overall control over the activities on the premises, part of a more extensive collection of relevant matters at [89]). (An application for special leave to appeal from the decision in Bostik Australia Pty Ltd v Liddiard is pending).
90 In Sydney Water Corporation v Abramovic [2007] NSWCA 248; 5 DDCR 570; (2007) Aust Torts Rep 81-913 at [98] Basten JA, with whom Mason P agreed, essayed a statement of criteria which may give rise to a duty owed to a worker who is an employee of an independent contractor, although in Caltex Refineries (Qld) Pty Limited v Stavar [2009] NSWCA 258 his Honour observed that he had not intended a precise checklist but rather a guide to criteria suggested by existing caselaw. The statement was:
"[98] However, the principal may also owe a duty to a worker who is an employee of an independent contractor. The legal question is to identify the criteria which must be satisfied to give rise to such a duty of care. The cases suggest that satisfaction of one of the following criteria may give rise to such a duty:
(a) the principal directs the manner of performance of the work;
(b) the work requires the coordination of the activities of different contractors;
(c) the principal has or ought to have knowledge of the risk and the employer does not and cannot reasonably be expected to have such knowledge;
(d) the principal has the means to alleviate the risk and the employer cannot reasonably be expected to do so;
(e) although the employer has or should have the relevant knowledge and can be expected reasonably to take steps to alleviate the risk, it does not, to the knowledge of the principal, do so."
91 To the extent to which in Rockdale Beef Pty Ltd v Carey at [79]-[84] factors generally relevant to the existence of a duty of care were regarded as sufficient to find a duty of care owed to an independent contractor, see also Tolhurst v Cleary Bros (Bombo) Pty Ltd at [64]-[70], the principles affirmed in Leighton v Fox must prevail. So also as to the criteria suggested in Sydney Water Corporation v Abramovic. In Caltex Refineries (Qld) Pty Ltd v Stavar at [108] Allsop P described the use of an independent contractor by a principal, rather than the direct engagement of employees, as "a significant factor in the existence or not of responsibility of the principal arising from the conduct or activity of the subcontractor and its employees or agents." The particular significance is illustrated in the observation in Leighton v Fox at [24] that "to import a duty akin to that of an employer to retain a degree of control over the [concrete pumping] work would be inconsistent with the relationship between principal and independent contractor."
92 There is no question in the present case of Jigsaw owing a duty of care to Mr Barahona because of a need for direction and co-ordination of activities on the site. Mr Barahona was to undertake the discrete task of raising the first floor beam to floor level. So far as the evidence showed this was in no way related to other activities being conducted on the site. This was a task for which Pacific as his employer and Mr Barahona himself were fully competent - it was not suggested to the contrary. According to the above principles, what circumstances, then, may have made it necessary for Jigsaw to retain and exercise a supervisory power over the system of work followed by Mr Barahona in performing the work?
93 The circumstances were, essentially, that Mr Barahona was employed by a specialist contractor on site; as now considered in more detail, he was told he was to follow the instructions and was under the supervision of the site foreman, Mr Barber; on the day of the accident he was required to perform a task to which he was directed by Mr Barber; and that task was within the scope of Pacific's contracted works on site.
94 Mr Barahona first went to the Strathfield Library site on 4 August 2003. He was taken by Mr Christou, and was introduced to Mr Barber. The crucial evidence was, referring to this occasion on 4 August 2003:
"Q. Did Mr Christou say anything to you in relation to Mr Barber?
A. INTERPRETER: He introduced me to Mr Barber, and he said that I will be working under his supervision.
Q. From then on, did you take instructions from Mr Barber?
A. WITNESS: (foreign language)."
95 The "foreign language" as recorded in the transcript was not taken up and converted to, or repeated in, the English language. There was no detailed evidence from Mr Barahona of what he thereafter did at the site, let alone of what could amount to supervision by Mr Barber. Mr Barahona said that from the August date until shortly before January 2004 he was "[r]ectifying the structures generally", sometimes working with someone else from Pacific identified only as "Siddy". He went to the site on about sixteen days in total; he thought most of the days were in January 2004 before he had his accident. One period was in early January, for about a week, when he attended with a Zivko Popovic (perhaps this was Siddy). When he went again later in January, on a couple of days, he did not know in advance anything he had to do, and was dependent on Mr Barber telling him "what to do"; in context, this meant what jobs to do, and there was marked absence of any evidence of Mr Barber telling Mr Barahona how to do whatever jobs he had to do.
96 On 20 January 2004, when Mr Barahona alone was on the site, he was told by Mr Barber to "raise the beam at floor level and to be careful with the carpet that are just being laid, and also the glass". Mr Barahona said that Mr Barber did not give him any instructions as to how to go about raising the beam, or as to how to get access to the beam to raise it.
97 Mr Barahona then unfastened some bolts and "undid the welding spots", gaining access from the first floor, and went to get back a ladder from near where Mr Barber was sitting at a desk. When "someone" said that the ladder did not belong to Mr Barahona, Mr Barber said "oh let it [sic] take the ladder because it's [sic] going to do a short job on the ground floor". Mr Barahona took the ladder, and used it in the manner earlier described, with unfortunate result.
98 In considering this evidence for acceptance by Mr Barber of the role of supervising Mr Barahona in the performance of his work, regard should also be had to the evidence of Mr Neubauer. Mr Barahona denied that Mr Barber told him on 20 January 2004 that, if he needed any help, he should ask Gary. Gary was Mr Neubauer. Mr Neubauer gave evidence that Mr Barber introduced Mr Barahona to him and "told me he was doing some work outside there and if he needed a hand doing anything that he was to come to get me …", and that Mr Barahona "just shook his head".
99 Mr Neubauer was also asked about other trades working on the site as at 20 January 2004. He said that there were four or five (electricians, carpenters, plumbers, and persons doing earthworks were instanced). He gave the evidence (although it was general, evidence of "what happened on the site from time to time"):
"Q. You would see Chris Barber giving instructions to various people on the site.
A. Yes.
Q. Some of those would be Jigsaw employees.
A. Yes.
Q. Some of those would be subcontractors such as electricians, carpenters or people involved in the steel construction.
A. Yes.
Q. On your observation was Chris Barber involved in telling the various people what to do from time to time?
A. Not so much what to do but where to do.
Q. When certain things need to be done? Is that a fair way to put it?
A. Maybe.
Q. Do you agree with that or not?
A. To a point, yeah."
100 A little later Mr Neubauer gave the evidence:
"Q. You were asked a question by the gentleman to my left about were people told what to do, and you answered it quite specifically, no, they were told where to do it - did you mean by that that the subcontractors where told where they would do their job, and were left to do their job?
OBJECTION (TORRINGTON). Two questions.
Q. They were told where to do their job. Yes?
A. Yes.
Q. And left to do their job. Yes?
A. Yes."
101 Mr Barahona had said that in January 2004 he saw Mr Barber "giving instructions for people working for different sub-contractors", and that one of the persons he was giving instructions to was himself (Mr Barahona). In our view, understood with Mr Neubauer's evidence the instructions were what to do rather than how to do it; and, to repeat, the specific evidence of Mr Barahona was that he was not given instructions as to how to go about raising the beam or how to get access to the beam to raise it.