The Administrative Procedure Act sets forth several procedural models for federal agency decisionmaking, but these APA models do not even apply to the largest and probably most important category of agency actions-the 3nformal administrative process.

• 《行政程序法》为联邦机构的决策提出了若干程序模式，但这些《行政程序法》的模式甚至都不适用于最大的、可能也是最重要的机构行动的范畴--非正式行政手法。