The DIYbio code of Ethics was first drafted in July of 2011. You can find more details at http://diybio.org/codes/. The basics are as follows:
Open Access
Promote citizen science and decentralized access to biotechnology.
Transparency
Emphasize transparency through the sharing of ideas, knowledge and data.
Education
Engage the public about biology and biotechnology, as well as their possibilities.
Safety
Adopt safe practices.
Environment
Respect the environment.
Peaceful Purposes
Biotechnology should only be used for peaceful purposes.
Tinkering
Tinkering with biology leads to insight; insight leads to innovation.