The Fixed-Term Work Act(2003) generally applies to all employees who are employed under a fixed-term contract of employment. You do not have to have worked for any particular period of time with your employer or work a minimum number of hours per week in order to be covered by the Act.
It does not, however, apply to those employed on fixed term contracts through employment agencies (e.g. agency nurses/midwives), apprentices, nurses/midwives in training, trainee gardai or members of the defence forces.