10.Section 2(1) sets out some of the elements that comprise a “controlled reservoir” to avoid any doubt about whether these elements are covered by the Act. Subsection (2) lists particular things that are not controlled reservoirs and therefore not subject to regulation under the Act. Subsection (3) enables the Scottish Ministers to define with more precision what structures are not controlled reservoirs and enables them to exclude other things from being (or being treated as) controlled reservoirs.