Rights issues on documentary project

<p>I am doing a photo shoot for an NGO in rural Tanzania in September. The purposes are to build their library of photos for donor presentations and print and web marketing and to create a photo book that they can use in their marketing and fundraising efforts. (This is a press book, not POD. We expect to have the actual print run sponsored.)<br>

I am donating my services, but will retain rights to all the images and may have some stock opportunities once the project is complete.<br>

I will be photographing a lot of villagers, including children--and we're talking about hundreds of images across more than a week on site. What concerns does this raise about model releases, etc.</p>

<p>I suppose that would depend on the laws in Tanzania, where the images are created and then in any place where the images are used, taking into consideration the laws in those places as well and the nature of the "use" of the images.</p>