This excerpt taken from the AMZN 8-K filed Jul 24, 2006.
III. Insider Trading Policy
Federal and state laws prohibit trading in securities by persons who have material information that is not generally known or available to the public.
Employees of the Company may not a) trade in stock or other securities while in possession of material nonpublic information or b) pass on material nonpublic information to others without express authorization by the Company or recommend to others that they trade in stock or other securities based on material nonpublic information.
The Company has adopted guidelines designed to implement this policy. All employees are expected to review and follow the Amazon.com Insider Trading Guidelines. Certain employees must comply with trading windows and/or preclearance requirements when they trade Amazon.com securities.