- Latest available (Revised)
- Original (As enacted)
There are outstanding changes not yet made by the legislation.gov.uk editorial team to Clean Air Act 1993. Any changes that have already been made by the team appear in the content and are referenced with annotations.
Revised legislation carried on this site may not be fully up to date. Changes and effects are recorded by our editorial team in lists which can be found in the ‘Changes to Legislation’ area. Where those effects have yet to be applied to the text of the legislation by the editorial team they are also listed alongside the legislation in the affected provisions. Use the ‘more’ link to open the changes and effects relevant to the provision you are viewing.
This section lists the changes and effects yet to be applied to the whole Act, associated Parts and Chapters where applicable. This includes any insertions of whole new Parts, Chapters or provisions yet to be inserted into this Act. These effects are included in this view as they may be (but won’t necessarily be) relevant to the specific provision that you are viewing.
This section lists the commencement orders yet to be applied to the whole Act. These effects are included in this view as they may be (but won’t necessarily be) relevant to the specific provision that you are viewing. Where applicable the commencement orders are listed under two headings, firstly those that bring some part of the Act you are viewing into force and secondly, those that bring into force legislation that affects some part of the legislation you are viewing. If you are viewing a prospective version or there is a prospective version available there may be commencement orders listed here that are relevant to the provision you are viewing.
(1)In this Act “dark smoke” means smoke which, if compared in the appropriate manner with a chart of the M1type known on 5th July 1956 (the date of the passing of the Clean Air Act 1956) as the Ringelmann Chart, would appear to be as dark as or darker than shade 2 on the chart.
(2)For the avoidance of doubt it is hereby declared that in proceedings—
(a)for an offence under section 1 or 2 (prohibition of emissions of dark smoke); F1. . .
F1(b). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
the court may be satisfied that smoke is or is not dark smoke as defined in subsection (1) notwithstanding that there has been no actual comparison of the smoke with a chart of the type mentioned in that subsection.
(3)Without prejudice to the generality of subsections (1) and (2), if the Secretary of State by regulations prescribes any method of ascertaining whether smoke is dark smoke as defined in subsection (1), proof in any such proceedings as are mentioned in subsection (2)—
(a)that that method was properly applied, and
(b)that the smoke was thereby ascertained to be or not to be dark smoke as so defined,
shall be accepted as sufficient.
Annotations are used to give authority for changes and other effects on the legislation you are viewing and to convey editorial information. They appear at the foot of the relevant provision or under the associated heading. Annotations are categorised by annotation type, such as F-notes for textual amendments and I-notes for commencement information (a full list can be found in the Editorial Practice Guide). Each annotation is identified by a sequential reference number. For F-notes, M-notes and X-notes, the number also appears in bold superscript at the relevant location in the text. All annotations contain links to the affecting legislation.
Geographical Extent: Indicates the geographical area that this provision applies to. For further information see ‘Frequently Asked Questions’.
Show Timeline of Changes: See how this legislation has or could change over time. Turning this feature on will show extra navigation options to go to these specific points in time. Return to the latest available version by using the controls above in the What Version box.
Click 'View More' or select 'More Resources' tab for additional information including: