 Section 15 of the Interpretation Act 1978 provides that where an Act repeals a repealing enactment, the repeal does not revive any enactment previously repealed unless words are added reviving it.This applies to Acts passed after the year 1850.Accordingly, any enactment whose sole effect is to repeal another enactment now becomes spent on coming into force; and any enactment, which is already in force, whose sole effect is to repeal another enactment is also spent.