Presidential State Funerals: Past Practices and Security Considerations [Updated December 3, 2018] [open pdf - 783KB]
From the Document: "On November 30, 2018, former President George H.W. Bush died. In the tradition of past presidential deaths, President Bush will receive a state funeral (designated as a National Special Security Event), which includes several ceremonial events in Washington, DC, prior to his burial at the George H.W. Bush Presidential Library Center at Texas A&M University in College Station, TX. The state funeral process is carried out by the Joint Task Force-National Capital Region, a division of the Military District of Washington (MDW). The official schedule for President Bush's state funeral is available from MDW's website."
CRS Insight, IN11003
Congressional Research Service: https://crsreports.congress.gov/