For the purposes of this Act, a live plant of a particular kind is taken to have been artificially propagated if, and only if, it was propagated in circumstances declared by the regulations to be circumstances the propagation in which of:
(a) any live plant; or
(b) any live plant of that kind; or
(c) any live plant included in a class of live plants that includes live plants of that kind;
would constitute artificial propagation.