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:
Promote citizen science and decentralized access to biotechnology.
Emphasize transparency through the sharing of ideas, knowledge and data.
Engage the public about biology and biotechnology, as well as their possibilities.
Adopt safe practices.
Respect the environment.
Biotechnology should only be used for peaceful purposes.
Tinkering with biology leads to insight; insight leads to innovation.