There is no universal set of procedures that applies to all cases. Each individual investigating agency would have it's own set of procedures.
Constitutional law
Cases involving admiralty and maritime law are about disputes and issues that arise on navigable waters, such as rivers, lakes, and oceans. These cases typically involve matters like ship collisions, cargo damage, maritime injuries, salvage operations, and maritime insurance claims. Admiralty and maritime law governs these cases to ensure uniformity and consistency in resolving legal disputes related to maritime activities.
Federal cases involving citizens of different states are called "diversity" cases if that is the claimed basis for Federal court jurisdiction.
Courts that hear cases involving young people are known as juvenile courts.
It is the limited jurisdiction that hears cases involving petty cash crimes.
The US Court of Appeals for the Federal Circuit has nationwide jurisdiction over cases involving patent law. It hears appeals of cases involving international trade from the US Court of International Trade.
Cases involving federal law.
cases involving small claims
All courts.
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Legislative
Courts have generally tried to fit cases involving internet transactions into the traditional concepts by placing weight on the physical locations of the parties involved. For example, the courts may say the law that applies is the law of the state where the company is registered, or where the individual disputants are physically located.