(a) A governmental body is not required under this chapter to allow the inspection of or to provide a copy of information in a commercial book or publication purchased or acquired by the governmental body for research purposes if the book or publication is commercially available to the public.
(b) Although information in a book or publication may be made available to the public as a resource material, such as a library book, a governmental body is not required to make a copy of the information in response to a request for public information.

(c) A governmental body shall allow the inspection of information in a book or publication that is made part of, incorporated into, or referred to in a rule or policy of a governmental body.