For those who have already taken part in the initial course, it is essential to keep up to date with the module to ensure that your certificate does not run out. With certifications lasting for three years, you must arrange a refresher course before it is due to expire. As well as refreshing your knowledge, this course ensures that you are well informed about new regulations. If you let your certificate pass the expiry date, you will need to sit the full three-day course again, meaning that you will not be eligible for the 12-hour refresher course.