The requirements for Personal Protective Equipment on motorcycles come from recommendations provided by the Motorcycle Safety Foundation and safety professionals involved in military motorcycle training programs. Nearly all these people ride extensively. Research in motorcycle mishaps dictates most policy. In the case of long sleeved garments, the primary purpose is to prevent excessive water loss from exposed skin to sun and wind. It's not much different than deciding not to ride because there is snow or ice on the road.
Some states issue a completion card unique to their state.
If you plan to register your motorcycle on base, you may wish to request an MSF Card. This may save time and aggravation when you move to another state. If the local program does not issue MSF cards, contact the Safety Center. In courses conducted by the state, motorcycles are provided. Often riders prefer to take the state-sponsored course if they do not wish to use their personal motorcycle in the course.