I'll just put my .02 in here. All laws in America, would apply in South Korea since you are in the military. Anything coming on to a military installation would fall under US Laws since, no matter what country you are in, once it gets to a US Military Installation it falls under US Law. If your gonna run anything, your best bet is SARMS. Specially since, I have seen many people, based on your MOS, I was 11B20, get tested for PED's.