Specifically, according to Stanley Lubman, administrative law courts «may inquire into only
the legality of administrative actions, not the appropriateness within the discretion of the agency involved».
First, the demise
of the distinction between jurisdictional and non-jurisdictional error
of law, along with the eradication in Ridge v Baldwin
of the distinction between quasi-judicial and
administrative decisions, paved the way for the development
of a unified set
of principles —
of legality, rationality and procedural propriety —
of judicial review
of administrative action.