and (3) of subsection (a); or

(4) in any way affects the right of fair use as provided by section 107,
or any contractual obligations assumed at any time by the library or
archives when it obtained a copy or phonorecord of a work in its
collections.

(g) The rights of reproduction and distribution under this section
extend to the isolated and unrelated reproduction or distribution of a
single copy or phonorecord of the same material on separate occasions,
but do not extend to cases where the library or archives, or its
employee-

(1) is aware or has substantial reason to believe that it is engaging in
the related or concerted reproduction or distribution of multiple copies
or phonorecords of the same material, whether made on one occasion or
over a period of time, and whether intended for aggregate use by one or
more individuals or for separate use by the individual members of a
group; or

(2) engages in the systematic reproduction or distribution of single or
multiple copies or phonorecords of material described in subsection (d):
*Provided*, That nothing in this clause prevents a library or archives
from participating in interlibrary arrangements that do not have, as
their purpose or effect, that the library or archives receiving such
copies or phonorecords for distribution does so in such aggregate
quantities as to substitute for a subscription to or purchase of such
work.

(h)(1) For purposes of this section, during the last 20 years of any