84.—(1) If a person is found to be carrying on a work activity in any place of work at any time at which work is being carried on, he or she shall, until the contrary is proved, be deemed for the purposes of this Act to have been employed in that place of work either by the person who has or who may reasonably be presumed to have overall control over the work activity concerned or by another employer carrying on work activities in that place of work.

(2) Where any entry is required by any of the relevant statutory provisions to be made in any record, the entry made by an employer or on behalf of an employer shall, as against the employer, be admissible as evidence of the facts therein stated, and the fact that any entry so required with respect to the observance of any of the relevant statutory provisions has not been made, shall be admissible as evidence that the provision has not been observed.

(3) In any proceedings under this Act a copy record may be given in evidence and shall be prima facie evidence of the facts stated in it, if the court is satisfied as to the reliability of the system used to make the copy record and the original entry on which it was based.