62 As I pointed out in Homestyle Pty Ltd v Perrozzi [2007] WASCA 16; (2007) 33 WAR 209 [20] (Martin CJ & Roberts-Smith JA agreeing), the relationship between the OLA and the common law of negligence, in particular the juridical basis of an occupier's duty of care, was considered on numerous occasions by the Full Court of the Supreme Court of Western Australia. Different opinions were expressed. In some cases it was held that the OLA prescribes the standard of care required to discharge any duty of care imposed by the common law. See, for example, Bryant v Fawdon Pty Ltd (1993) A Tort Rep 81-204, 62,005 - 62,006. In other cases it was held that the OLA imposes on an occupier a duty of care to entrants and that the OLA covers the field; that is, a concurrent duty is not owed at common law. See, for example, Tonich v Macaw Nominees Pty Ltd (Unreported, WASCA, Library No 940119, 11 March 1994), 13. Subsequently, many cases have been litigated on the basis that an occupier owes an entrant concurrent duties at common law and under s 5 of the OLA. See Homestyle [21] - [29], where I review a number of the decisions. See also Watch Tower Bible Society and Tract Society of Australia v Sahas [2008] WASCA 51; (2008) 36 WAR 234.