The other one that has changed more recently is the one related to cumulative joint trauma. In the past, the department and the board were always looking for the one incident—the one accident, the one event—that caused your injury. We would often argue and say, “Well, you know what, you might be a tanker wearing a heavy helmet with night vision goggles, and over time that continued bouncing around with the weight on your head is going to affect your neck.” The department and the board have both moved to accept the reality of cumulative joint trauma. They now recognize that it doesn't have to be just one incident that causes your disability but a number of small incidents over a longer period of time.
On June 16th, 2016. See this statement in context.