30.—(1) A decision (given under paragraph (2) of Article 29 or otherwise) that an accident was an industrial accident is to be taken as determining only that sub-paragraphs (a), (b) and (c) of paragraph (6) of that Article are satisfied in relation to the accident.
(2) Subject to paragraphs (3) and (4), no such decision is to be taken as importing a decision as to the origin of any injury or disability suffered by the claimant, whether or not there is an event identifiable as an accident apart from any injury that may have been received.
(3) A decision that, on a particular occasion when there was no event so identifiable, a person had an industrial accident by reason of an injury shall be treated as a decision that, if the injury was suffered by accident on that occasion, the accident was an industrial accident.
(4) A decision that an accident was an industrial accident may be given, and a declaration to that effect be made and recorded in accordance with Article 29, without its having been found that personal injury resulted from the accident.
(5) Paragraph (4) has effect subject to the discretion under Article 29(3) to refuse to decide the issue if it is unlikely to be necessary for the purposes of a claim for benefit.