And the laws that define the legal powers of government are summed up as administrative law. The law guides the agencies to enforce their powers and use appropriate action to punish those who disobey administrative law. A statute, or law, has created the agency through the legislative branch of government. This law, which created the agency, also enacts rules which govern and these are called substantial rules. Those rules which the agency itself would create would be called interpretive rules.
Substantial rules are like law and enforced appropriately and have little room for interpretation.
Because interpretative rules are not in place through the actions of the legislature but through the actions of the agency, they have more room for interpretation. Procedural rules are also established and are necessary for the agency to survive. Examples would be rules of conduct for informal consultations and formal hearings as well. These rules are not also strictly adhered to like substantial rules. Agency procedural rules encourage participation by the public and also protect the rights of the client.