The information contained in this teaching module and the accompanying PowerPoint slides is appropriate for use in a survey public health law course or seminar. The purpose of this lesson is two-fold. The first objective is to provide law students with an overview of the authority public health agencies have to set and enforce policies necessary to keep the population healthy. The second objective is to inform law students about the legal constraints courts have placed upon the actions of those agencies. The module ends with a project designed to give law students the opportunity to apply the law to a “real world” situation.