If your use of a copyright work does not involve using
a substantial part, then you will not be
infringing copyright. What constitutes a “substantial part” is determined on a case by case
basis
and there are no set guidelines. In some cases a very small part of a copyright work (such as
a
summary, the headline, a list of recommendations or the concluding remark) will constitute a
“substantial part”. Also, illustrations and graphs are considered to be separate works
to the text of
an article, chapter or book. For larger texts a good rule of thumb is no more than 800 words in
total extracts with no single extract from the work exceeding 300 words. For poems, 40 lines is
a
good rule of thumb provided that does not constitute more than 25% of the poem.
