In order to qualify for an Unfair Dismissal Remedy, you need to have been employed by the employer for at least 6 months or if the employer is a small business employer, 12 months (see s383).
What is a small business employer?
A small business employer is someone who at a particular time of the dismissal employs less than 15 employees (see s23).
What is considered an employee for the purpose of determining the number of employees in a small business?
An employee is someone that is employed at the time of the dismissal and is not a casual employee. Unless that casual employee is employed on a regular and systematic basis. It also includes the person that was dismissed and any other people that were dismissed or terminated.