13 So far as private enterprises are concerned, the trade or business of that enterprise is that trade or business in which it predominantly or usually engages, rather than trade or business in which it might at some other time choose to engage. So, in the case of a large enterprise such as Wesfarmers, which carried on a number of diverse businesses, and for the purpose of those businesses maintained a fleet of vehicles, it was possible to characterise the maintenance of the vehicles as part of that trade or business (see Jones v Wesfarmers Ltd [2003] WASCA 225). Many other enterprises, however, may have but one, much more specialised, trade or business. An example discussed during the course of argument was that of a barrister, who by definition is engaged only in the business of providing legal services of a rather specialised kind. Some barristers may use vehicles during the course of that business, for example, to visit persons in prison, and it is, of course, necessary for those vehicles to be roadworthy. However, the business remains only the business of providing legal services, and not the business of maintaining the vehicle. Work of that kind, whether the barrister normally carried it out himself or engaged others to do it for him, would not be part of the barrister's trade or business either directly or indirectly.