Even if your bosses are understanding, it is still important to read and understand the benefit. I had bosses that were not so understanding. My father in law died during the work day, I called them and told them it was probably happening and to line up help so that if he died I could go to the hospital to be with family. He died a couple of hours later, I called in and they had all gone home. No one was lined up to cover, the office person told me I could skip my break, but I had to finish my route.