As landlords, are we allowed to charge tenants for not letting scheduled techs in?

[Jerry Poon]

There is a property I manage with a couple of issues that require fixing. We are scheduling with the tenant on when the technician can go inside. If the tenant and I agree to a schedule, the technician shows up at the scheduled time, and no one lets in the technician, am I allowed to charge the tenant for this?

The technician will need to be paid either way, so if the tenant doesn't let him in, then I (or the owner) is on the hook for the cost. Therefore I want to protect the owner and I and pass on any charges incurred if the tenant doesn't oblige by the schedule. Is this allowed?

We have a lockbox where the technician can let himself in anyways, but this little thought exercise has me curious.