In answer to your query : fair use.

Bibliographic Details
Corporate Author:	Library of Congress. Copyright Office
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.] : [U.S. Copyright Office], [2004]
Subjects:	Fair use (Copyright) > United States.
Online Access:	https://purl.fdlp.gov/GPO/LPS4917

Available Online