The major change is that the new Fixed Service Height Laws will be in effect for the following events being hosted in Canada:
1. 2019 Canada Open
2. 2019 CND Junior International
3. 2019 Pan Am Junior Championships
With the Fixed Service Height Laws, the shuttle must be below 1.15 meters from the surface of the court at the instant of being hit by ther server's racket.
To read more about this change as well as a few others in English click here. For the French version click here.