In this subtitle, “action” means: the adoption of a local law or regulation concerning: a special exception under § 1–101(p) of this title (Definitions – “Special exception”); or plan implementation and review under § 1–417 of this title or § 3–303 of this article; a requirement under § 9–505(a)(1) of the Environment Article and § 4–415(c) of the Local Government Article (Municipal annexation); or a required finding under §§ 9–506(a)(1) and 9–507(b)(2) of the Environment Article (Water and sewer plan review).