I am a bit embarrassed now.
I looked in the Alberta OHSA regs and didn't see any requirement for AED.
Not even on remote site employing more than 200 people.
It might not be in the regulation or I maybe I am just not reading the list right.
Where I do see them the most is in offices and public buildings that have large numbers of people like malls and colleges.
They have become quite common there.

They are not usually considered part of a mobile kit because they like plugging them in to keep the batteries charged.

Getting the certificate is still good. If you ask the safety officer he will be able to tell you if they supply them on your site.