If you have a valid reason for your absence, the teacher may refer you to the open learning centre or the learning platform to catch up. The teacher is not obliged to offer you a catch-up lesson.
If you have a valid reason for your absence, the teacher may allow you to take your assessment at a later time.
For all other students, it is only mandatory to report absences during assessments. However, as a basic courtesy, it is recommended to inform your teacher of any absences during other lessons as well.