sIRBs and Study Managers can now close sites on studies. A reason or reasons for closure, date of closure, and determination letter are required to post a site closure. Closing a site sends a notification to the site’s HRPP and study team members and archives all past approvals so that no documents can be downloaded. Participating sites continue to have access to site closure documentation for 30 days after a site closure is submitted, after which the site cannot access the study in IREx. A listing of closed sites is available to sIRBs and Study managers on the Status Summary tab. For further information, see the Site Closure Quick Guide.