DES MOINES , Iowa , April 14 / PRNewswire-USNewswire / -- In response to the State of Iowa 's new smoke-free law , the American Lung Association of Iowa will host a " Making Your Worksite Tobacco-Free " conference on April 29th in Coralville , Iowa to assist businesses making the transition to a healthier workplace . The conference will offer information on the new law , and feature speakers who have already made the transition . The conference is for businesses that have questions about the law and the process of making their worksites tobacco-free .