What I think it means, johnjohn, is that if you have a book of 100 pages which is divided into chapters, if the pages you copy are from different chapters the limit is 10% of the whole book, i.e., 10 pages, but if the pages you copy are from just one chapter there is no limit on the number of pages you copy.

In other words, if you copy from different chapters you come under (a) and the limit is 10%, the same as it would be for a book which wasn't divided into chapters. But if you copy from just one chapter you come under (b) and can go over the 10% limit.

Bingley

Bingley