If you look at a part of the law called the Local Government Act 1974, you will find a section that used to be about extraordinary vacancies. You can see that this section is marked as repealed, which means it is no longer part of the law. This section was removed from the law on 1 July 1992, by a change made in the Local Government Amendment Act 1992, which you can find more information about by following the link to section 67(1).