When you are answering the Terms of Service questionnaire, you will be asked if you subscribe to an industry or trade code of conduct. An industry or trade code of conduct is a set of rules put in place that regulates the conduct of those who agree to follow it. Codes of conduct usually govern how a business interacts with its staff, customers, and other businesses. An example of a code of conduct would be the American Marketing Association's code that requires marketers to clearly list the prices of the items being marketed. You should answer "yes" to this question if you do subscribe to an industry or trade code of conduct.