Australia, like most countries, closely follows the international standards on Labour Force statistics. These standards were most recently ratified in 2013, at the 19th International Conference of Labour Statisticians.
Under these standards, people are classified as employed if they have been stood down and are not working for a short period but maintain an attachment to their job.
Australia limits to 4 weeks the length of time that someone can be effectively attached to a job without pay, and still be classified as employed. The international standards allow for up to three months of being attached to a job without pay and still being classified as employed. Many countries use this longer time period to measure employment (including countries in the European Union and the United Kingdom, for example).
Most countries are yet to report data for April.