Is a tenant required to facilitate access, or merely consent?

I am a tenant in a strata scheme, and I got an email from the agent telling me about upcoming legally requried work (the child safety thing for windows). It nomitates a date (about a month in the future) and time that the installers require access to my unit, which I am happy to consent to.

Unfortunately I need to work at that time. I replied to the agent’s email telling them this, and got a phone call back. They claimed that it is my responsibility to arrange for the installers to have access, and that if they can’t get access, strata will be charged an additional call out fee, which strata will then pass on to me.

This seems dubious to me. Is this accurate? I would have thought that the responsibility lied with the owner to arrange access.