In this FAQ from the Center for Science and Culture:
What about the American Association for the Advancement of Science (AAAS) and its resolution against intelligent design?
In 2002 the board of the AAAS issued a resolution attacking intelligent design theory as unscientific. Unfortunately, the process by which this resolution was adopted was itself anything but scientific. In fact, the resolution was more a product of prejudice than impartial investigation.
After the resolution was issued, members of the AAAS Board were surveyed about what books and articles by scientists favoring intelligent design they had actually read before adopting their resolution. Alan Leshner, the Chief Executive Officer of the AAAS, declined to specify any and replied instead that the issue had been analyzed by his group’s policy staff. Two other AAAS board members similarly declined to identify anything they had read by design proponents, while yet another board member volunteered that she had perused unspecified sources on the Internet.
In other words, AAAS board members apparently voted to brand intelligent design as unscientific without studying for themselves the academic books and articles by scientists proposing the theory. It should be noted that a number of the scientists supportive of intelligent design theory are members of the AAAS, so the AAAS board clearly does not speak for all members of that organization.
Center for Science and Culture (n.d.) Frequently Asked Questions. Discovery Institute. Available http://www.discovery.org/id/faqs/. Last accessed 18th Jul 2015.