Academic disputation continues as to whether Nigerian courts are bound to apply English decisions subsequent to 1900. From a practical point of view, however, such decisions are treated as authorities which ought to be followed unless there is strong reason to the contrary. In the area of tort, only when the question of damages has arisen have judges in Nigeria shown conspicuous signs of independence. For practical purposes, therefore, one may treat the Nigerian law of tort as being identical with that of England except where the latter has been modified by statute. The tort of negligence has, of course, been little affected by legislation in England. The most important legislative change, relating to apportionment of damages in contributory negligence cases, has been adopted in all parts of Nigeria. In the Northern States, however, the doctrine of common employment is still in force, and only Lagos has legislation based on the Occupiers' Liability Act, 1957.