**7.4 Military certifications in different countries**

Military aviation is an important factor in security and defence preparedness of each state. All military airworthiness activities are conducted and regulated on a national basis, and in general most military authorities have not published military airworthiness design standards for an acceptable level of safety. In general for the military airplanes, the military specification and documents nominate some specified elements like:


While the principle remains the same, the practices evolved in different countries over a period of time, differ from each other to a varying degree. The range of control over all the activities in design, development evaluation, and testing varies from total control to delegated system of working, with emphasis on contracts and penalties for shortfalls in performance, time and cost overruns [13, 14, 18–27, 29].
