Most generally, instructions laid out in the contract itself. Other than that, they can be changed by consent of all parties, or in the case of a business, the majority of the stakeholders of the company .
They reflacted because they supported individual liberties
The Federalists opposed including a bill of rights on the ground that it was unnecessary. The Anti-Federalists, who were afraid of a strong centralized government, refused to support the Constitution without one
Administrative law is the body of law that governs the activities of administrative agencies of government. Government agency action can include rule making, adjudication, or the enforcement of a specific regulatory agenda. Administrative law is considered a branch of public law