Ok, my area of expertise is YONGSAN, Korea; where I am currently stationed. According to USFK REG 190-1 All motor vehicles under 50cc are considered Mopeds, and must adhere to all regulations of having motor vehicles above 50cc, except having to get a license plate for Korea. It is the same with other posts. CONUS and OCONUS both require you to have all motorcycle PPE (personal protective equipment) DOT helm, boots, reflective vest, and you must take a motorcycle saftey course. In Korea vehicles are not allowed for E-7 and below unless command sponsored. -but you can get a exception to policy. Mopeds are a company level memorandum, anything bigger is first O-5. Thats all I can think of for now, any questions just post them and I will post it or find out for you. p.s. I don't follow any of those rules, what i do is ride my bike with pedals and clutch engaged on post, and ride with motor off post to the nearest gate.