Determining what is required to be accessible when a facility is altered or expanded can be a challenge. This session will review how Chapter 2 of the ADA and ABA Accessibility Standards apply to planned alterations and additions. Presenters will clarify common sources of confusion, including what type of work constitutes an “alteration,” how the scope of work determines application, the provisions for primary function areas and accessible paths of travel, historic facilities, and technical infeasibility.