(1) In this section -
"appropriate tax" has the meaning assigned to it in section 739E;
"authorised officer" means an officer of the Revenue Commissioners authorised by them in writing to exercise the powers conferred by this section;
"books, records or other documents" includes -
(a) any records used in the business of an investment undertaking whether -
(i) comprised in bound volume, loose-leaf binders or other loose-leaf filing system, loose-leaf ledger sheets, pages, folios or cards, or
(ii) kept on microfilm, magnetic tape or in any non-legible form (by use of electronics or otherwise) which is capable of being reproduced in a legible form, and
(b) every electronic or other automatic means, if any, by which any such thing in non-legible form is so capable of being reproduced, and
(c) documents in manuscript, documents which are typed, printed, stencilled or created by any other mechanical means or partly mechanical process in use from time to time and documents which are pro
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