You're most likely referring to two measures in the act. One is examination fees, which are distinct from a course of study but are necessary in order to carry on a trade or a profession in Canada. These will now be eligible for the tuition tax credit as long as the fees paid are in excess of $100.
In some cases, the final examination fees may be part of the course of study. For other professions, such as veterinarians, the actual examination fees are paid separately and up until now would not qualify for the tuition tax credit. In addition, we have shortened the length of courses that will be eligible for the tuition tax credit—courses undertaken outside Canada. This measure recognizes that in some cases foreign universities may have semesters shorter than the traditional 13 weeks.