Administrative agencies rely heavily on the foundational legal mechanisms of the administrative state – rulemaking, licensing, and enforcement adjudication – to pursue their statutory objectives. These foundational mechanisms differ from each other in critical ways, including the applicable procedures (and the participatory rights that accompany them), the legal effect of their use, and the nature and extent of oversight (including judicial oversight) that accompany their use. As a result, an agency’s choice of which mechanism(s) to use to implement its statutory mission has significant impacts on key legitimizing features and values of the administrative state. This Article helps to fill this gap in the literature through an empirical case...