(1) Copyright in a work is infringed by a person who, other than pursuant to a copyright licence, does any restricted act.
(2) References in this Act to the doing of a restricted act are to the doing of that act—
(a) In relation to the work as a whole or any substantial part of it; and
(b) Either directly or indirectly;—
and it is immaterial whether any intervening acts themselves infringe copyright.
Compare: Copyright, Designs and Patents Act 1988, s 16(2), (3), (4) (UK); 1962 No 33 ss 3(1)