A couple of technical points first. There is no statutory definition of a visitor but there is an official warning letter, which is a Notice To Comply.
Foe the Owners Corp to take action, they have to issue a Notice To Comply on a specific form and it has to include details of the by-law that has allegedly been breached. By the way, the owners corp can only take action against the resident of the building, not visitors.
And that brings us back to the definition of “visitor”.
If we start from the assumption that every building has its own by-laws, that that has to be you or you partner’s first port of call. For instance, the by-laws might define a vistor as someone who is allowed to park in the parking space for no more than two hours during the day and, if staying overnight, be required to arrive after a certain time leave by a certain time. Or not.
The answer is in the by-laws and if there is nothing there that defines visitor, then you have a lot of wriggle room.
Having said that, abuse of visitor parking is a big issue in strata and it’s a battle where you don’t want to place your friend in the firing line if you can avoid it.
Get a hold of the by-laws and the make that call. They may be just trying to find out who you are and whether or not your are a permanent resident stealing a visitor spot.