If you take a look at the Criminal Records Act, there's a link to section 6.3, which defines “vulnerable person”. In section 6.3, it provides that, at the request of a person who is responsible for the well-being of a vulnerable person, they can essentially disclose these records through a request process.
Then there's schedule 1. Schedule 1 sets out the kinds of offences that would still be disclosed even when you've received a record suspension. They're largely sexual offences, and that makes a good deal of sense. You're talking about somebody who is applying to work in the care of vulnerable people. Even though they may now be of good character, I certainly understand that.
There are, however—and I'm sure you have studied this—what are called non-conviction records. That is, even though you don't have a conviction, you can be barred from certain opportunities because you've been in contact with police, you have provincial offences, you're on bail conditions or a whole number of things.
This offence, however—the possession of cannabis—is not listed in schedule 1. It wouldn't fall under that disclosure mechanism for vulnerable people set out in section 6.3.