Here's the deal... You go into a national reserve to photograph landscape, reportage and wildlife. You state in writing what your intentions are by filling out a park questionnaire and receive permission to enter the reserve accordingly. You work for two months in the reserve and capture beautiful images. On the day you leave, the park administration say you should have signed a Property Release ( Chart) but they forgot to ask you to do so when you arrived. What rights do you have if you want to sell the images? And what rights do the park have to restric you from doing so?