The window guard is the first question on every occupied job
Guards come off and go back on, and no landlord or parent is booking anything until somebody explains how.
Apartments with young children carry window guards, and this city takes that seriously enough that landlords and half the parents in a building ask about them before they ask about glass.
The question is always practical. Do the guards come off, who puts them back, does the new unit take the same guard, and what happens in the hours between the old sash coming out and the new one going in.
Film the answer once and it will work for years. A guard coming off, the opening worked, the guard back on and pulled against, and somebody saying plainly who does that and when. A clip on that subject gets forwarded between a managing agent and a tenant more than anything else you publish.
Say what your crew does on the day and let the obligation questions go to whoever owns them. The caller is asking about the morning of the install, not about a rule, and the morning is the part you can speak to with total authority.
It sorts your inquiries too. An owner who watches you handle guards without being prompted assumes you have worked occupied buildings before, which is the thing they spend the first minute of every call trying to establish.