How long can you remove your aligners at a time?

Not sure if the community here is active but I’ll still post my question here.

I’m wondering how long is it allowed to remove the aligners? I’m in the Human Resources department and I conduct interviews everyday. I had a coworker who had aligners and when she wore it during our interview sessions, her words aren’t that clear as before. It sounds like she has a gum in her mouth while talking. I am wondering if it’s okay if I don’t wear the aligners for the whole day and just put it back after my work?