Migration Law - avoid confusion when Calculating Time Periods The Australian Immigration System is thought to be one of the most complicated immigration systems in world. As a result, calculating time periods can be extremely complicated. Immigration Law consists of the Act, Regulations and Procedure Advice Manuals. The Procedure Advice Manuals provide guidance and instructions on how to interpret the law, namely the Act and the Regulations. We have reproduced below and excerpt from the current … Full Story