In the last photo of a slideshow of the 69th anniversary of Hiroshima bombing, there's a description of the photo, plus what I assume is metadata-ish content (emphasis added):
U.S. Ambassador to Japan Caroline Kennedy attends a ceremony at the Hiroshima Peace Memorial Park in Hiroshima, western Japan, Wednesday, Aug. 6, 2014. Japan marked the 69th anniversary Wednesday of the atomic bombing of Hiroshima. (AP Photo/Kyodo News) JAPAN OUT, MANDATORY CREDIT
I assume "Mandatory credit" means that any news organization using this photo has to credit the organization that took it. And obviously, the photo was taken in Japan. But what does "out" mean?
Likewise, I can see "China out" in this article featuring a photo taken in China.