"The relevant laws that govern shutdowns have remained relatively constant in recent decades. However, agencies and officials may exercise some discretion in how they interpret the laws, and circumstances that confront agencies and officials may differ over time. Consequently, it is difficult to predict what might happen in the event of some future shutdown. Still, information about past events may offer some insight into possible outcomes and help inform future deliberations. This report provides an annotated list of historical documents and other resources related to several past government shutdowns."
CRS Report for Congress, R41759
Congressional Research Service: https://crsreports.congress.gov/