...photography gives us a creative interpretation of the world. However,
when we want pictures to record and inform us of the varied events,
issues, people, and viewpoints in our world, there are limits to how
pictures can be made.
....the entry rules make clear that digital manipulation which adds,
rearranges, reverses, distorts or removes people or objects from within
the frame is not permitted, and the rules are backed by the forensic
comparison of original camera files with the contest image in the second