1) You'll need to know the requirements for a school bus when receiving and discharging passengers. For example, in Ontario the driver would have to be stopped before activating the retractable stop sign.
2) In Ontario, you'd either be charged as the driver or the owner of the vehicle. If you weren't charged at the scene, the owner of the plates will be charged at a later date. This is a more desirable scenario since it doesn't carry points or insurance implications. This may not be the case in your province.
This may also be the case in your area.
Here's an example:
https://www.ottawapolice.ca/en/safety-a ... Letter.asp