I have been casual for about 2 years, the last year averaging 35-40 hours a week. They have just informed me that it is illegal to be casual more than 12 months. They want me to do 5 days of 4 hours or 2 days of six hours. Is it illegal to stay casual on these hours under employment law? I am happy being casual. Or is there an underlying reason why their HR department has said this, not thinking I would check? Some talk about I could be classed as not casual and entitled to leave?