Each organization uses its own contract / agreement between artists and labs. Here are various examples: one developed by the Cross-Cultural Partnership Working Group (UK), contracts used by Artistsinlabs (Switzerland), ITEM (UK), ANAT (Australia), agreements used by Watershed (GB), and options for the explotation of the results of the collaboration developped by Disonancias (Spain).
The agreements used by Watershed are memorandum of understandings, although they do get them checked out by their lawyers. They cover rights and IP, plus what they expect people to deliver, and are specified in collaboration with the partners. They don't specify that the products of the work are open-source as they leave that up to the people they are commissioning to decide (you can download the file above).
They also drew up some guidelines for people taking part in a knowledge sharing event, to try and get them to take IP seriously. http://www.mediasandbox.co.uk/intellectual-property-confidentiality/
A very good handbook to find open source/models of ownership agreements is one written by Lawrence Liang - who is based in Bangalore at the AltLAwForum, India. Ref: http://www.p2pfoundation.net/Lawrence_Liang_Against_Intellectual_Property
The cross-cultural partnership template is designed to help potential collaborators to reach understanding and agreement on the terms of their collaboration. Following this link http://newmedia.umaine.edu/stillwater/partnership/partnership_template.html will take you to a template and explanatory notes which draw upon the law: the result of long-term consideration of issues around collaboration in different situations and arenas.
The template was created by the Cross-Cultural Partnership Working Group in 2007, which has brought together artists, scholars, and activists from over a dozen indigenous and developed nations. Its goal is to envision a legal and cultural framework for sharing knowledge in a way that is equitable, responsible and sustainable. Core members of the team include anthropologist and Artsactive member James Leach, lawyer Wendy Seltzer, New Media artists and scholars Jon Ippolito and Joline Blais, Charlene Francis of the Penobscot Nation, Miigma'gan of the Micmac Nation, and gkisitanimoogk of the Wampanoag Nation.