Every publisher of a book must, at the publisher's own expense, give to the National Librarian, within 20 working days after the date when the book is first published, copies of the book as follows:
(a) if the price of 1 copy of the book exceeds $1,000, 1 copy; or
(b) in any other case—
(i) if 100 or more copies of the book are published, 2 copies; or
(ii) if fewer than 100 copies of a book are published, 1 copy.