[HuBBaTheMan]

You always own the copyright and publishing right for the photos as the creator of the image. That is pretty set for international copyright and the only way you can waive/remove that right is if you do it intentionally through a contract.

However, national law may govern HOW you can use the images if you have a identifiable person on the images. For example defamatory or commercial use may need the consent of the person on the images.

The use of a release form (modelling agreement) is usually to govern both what the model are allowed to do with the images in terms of limited copyright and that he/she agrees that the use of the images can be commercial.

Even if you are shooting it TFP these waivers needs to be signed since IF you are a company, using those images for your own promotion will most likely be considered commercial use. Especially on the internet.

Note though that the copyright is an international law afaik, but the models consent of publishing images are a national law so it may differ quite a bit.