Question regarding California cannabis law. [View all]

Serious question here. I manage a small apartment complex in California. Several of my tenants have legal medical cannabis prescriptions for various reasons (including one confined to a wheelchair with MS).

The property management company has issued a new cannabis prohibition, saying no form of it is allowed on the property at all: plants, bud, edibles, etc. I have told my tenants privately that I will not enforce this draconian and immoral rule. However, I have asked them to use a vape or edibles instead of smoking it so that no one who has a problem with it can report the smell and complain. I already vape it for pain and sleep, and I have no intention of stopping or telling others they have to stop.

My question is this: Can the property management company legally prohibit all forms of cannabis on the property, even for those people who have medical prescriptions and are eating or vaping it, disturbing no one?