I've been on property about a year and a half. I haven't called in sick yet. I'm a mil background so I've never dealt with "calling in sick."

All this letter did for me was confuse me how to call in sick. I guess my question is, what is the companies preferred method/timeline to call in sick? >24hrs? That's about the only metric that I can think of that would be remotely reasonable for them to ask of the pilot force.