The expiration date of your visa is the last day you may use the visa to enter the United States. It does not indicate how long you may stay in the United States. Your stay is determined by the Department of Homeland Security at your port of entry.
In some circumstances, a person may be released from custody without bail and be given an order to appear, with certain conditions as governed and directed by a court-affiliated agency. Project Remand ('PR'), a Ramsey County pre-trial court service program, is one example of such an agency.
Administrative agencies are lawmaking bodies with limited powers delegated by Congress. Administrative agencies specialize in specific issues that require expertise. The rules and regulations created by administrative agencies can be enforced as law. The agencies help in the speedy disposal of cases, both minor and complex and thus are a big aid to US courts.