We all know that authority is one of the ingredients for a sale but what do you do when you have limited or no authority about a subject.
My background is in military and civil aviation. I've made a product that shows people how to increase their chances of becoming a navy pilot. I have first-hand experience in the area and have talked with current and former pilots as well as recruiters and people who sat on the selection boards.
I also have a product that shows people what they can do to become a pilot in the U.S. Army. I have no experience flying or training to become a pilot in the Army but I have talked to numerous army pilots and have done a lot of research.
Also, most of the qualities, skills, etc that the Navy looks for in a prospective pilot are universal so each service, for the most part wants to see the same thing. The difference is the training.
I'm developing a product on how to increase your chances of becoming a United States Marine Corps sniper. I have no experience here either. This does not involve aviation and is totally out of my "core" strengths but I believe that with another research and talking to people who have gone through the process I can develop a really good product.
So I ask the warriors here. How would you go about adding authority to the above examples (especially cases 2 & 3)