An “authorised” series of law reports is one which is recognised, by the court whose judgments are reported, as containing the most authoritative version of its judgments.
The conventional hallmark of the authorised reports is that they are produced pursuant to arrangements with the court, which allow the deciding Judges an opportunity to review and make final corrections to the proposed report before it is published. These corrections are not limited to removing errors in citations, quotations or expression. Judges are entitled to make changes which more clearly express their intended meaning, provided that the change is not one of substance. For this reason, the text of the judgment in an authorised report may differ from the text of the judgment as originally delivered.
By convention, the authorised report of a judgment is the preferred mode of citation. This convention is explicitly confirmed in some jurisdictions by practice direction.