This excerpt taken from the AMZN 8-K filed Jul 24, 2006.
VI. Price Fixing
Employees may not discuss prices or make any formal or informal agreement with any competitor regarding prices, discounts, business terms, or the market segments and channels in which the Company competes, where the purpose or result of such discussion or agreement would be inconsistent with applicable antitrust laws. If you have any questions about this section or the applicable antitrust laws, please contact the Legal Department.