Inter-Owner Trade Agreement
This is a kind of General Public License for collective 'user' ownership of the physical means of producton or of any physical object.
It is based on the concept and research by Patrick Anderson and aims to guarantee the freedoms of the GNU GPL license to the physical world.
"This inter-owner trade agreement is designed to insure every User has the freedom to Use(0), Modify(1), Copy(2) and Share(3) free Objects by causing all profit be an investment for that User toward physical Sources needed for production of more of that kind of Object." (http://ecocomics.org/general%20public%20law.html)