The diybio.org group made this code in 2011, as far as I know. We have a handout for prospective members of Hackuarium that includes it too...
Here it is:
Emphasize transparency and the sharing of ideas, knowledge, data and results.
Adopt safe practices.
Promote citizen science and decentralized access to biotechnology.
Help educate the public about biotechnology, its benefits and implications.
Know you don’t know everything.
Carefully listen to any concerns and questions and respond honestly
Biotechnology must only be used for peaceful purposes.
Respect humans and all living systems.
Recognize the complexity and dynamics of living systems and our responsibility towards them.
Remain accountable for your actions and for upholding this code.
DIYbio code of ethics, Draft from the European Delegation, May 2011
Probably there could be many versions of this out there now, of course!
I should also note that DIT Research is more close to my heart (do it together!) than the original diybio...
ciao for now,