"The original decision to put in place that biosecurity order until 15 May has proved very effective and it will run its full course until that time without any change," Morrison said on Friday in the city of Newcastle, located north of Sydney."The original decision to put in place that biosecurity order until 15 May has proved very effective and it will run its full course until that time without any change," Morrison said on Friday in the city of Newcastle, located north of Sydney.