Associations and their members work with Congress on a regular basis. However, a simple offer to provide tickets to a sporting event or a nice bottle of wine around the holidays could have unintended consequences. Make sure you have a general knowledge of the rules to mitigate any potential problems that may arise through the course of business.
A summary of the House gift rule can be found here. The rule provides the following provision on acceptable gifts, and 23 other provisions that describe additional gift situations.