A system of rules is a set of guidelines that governs a particular action or behavior. Synonyms for the term "system of rules" include regulations, protocols, procedures, guidelines, principles, policies, protocols, and codes. Each of these synonyms implies a set of norms that specify acceptable or unacceptable actions in a particular context. Regulations are typically imposed by a governing entity and carry with them the force of law. Procedures refer to a specific sequence of steps to follow to accomplish a specific task. Policies are, typically, a set of principles that guide decision-making. Guidelines and protocols both refer to a set of general rules and instructions, while codes are usually specific sets of rules and procedures.