When you are looking at the law about quarantine and the Health Act 1956, you will see a part called 'Aircraft declaration'. This part is numbered 103. You should know that this part of the law is no longer in use, which means it has been repealed. It was repealed on 23 March 1987 by a change made to the law, which you can find out more about by looking at the section 14 of the Health Amendment Act 1987.