Editing Encyclopedia:Copyrights (section)

=== Non-free materials and special requirements ===

Wikipedia articles may also include quotations, images, or other media under the U.S. Copyright law "fair use" doctrine in accordance with our [[Wikipedia:Non-free content|guidelines for non-free content]]. ''In Wikipedia'', such "fair use" material should be identified as from an external source by an appropriate method (on the image description page, or history page, as appropriate; quotations should be denoted with quotation marks or block quotation in accordance with [[Wikipedia:MOSQUOTE#Quotations|Wikipedia's manual of style]]). This leads to possible restrictions on the use, outside of Wikipedia, of such "fair use" content retrieved from Wikipedia: this "fair use" content does not fall under the CC BY-SA or GFDL license as such, but under the "fair use" (or similar/different) regulations in the country where the media are retrieved.

Prior to June 15, 2009, Wikipedia did permit some text under licenses that were compatible with the GFDL but might require additional terms that were not required for original Wikipedia text (such as including Invariant Sections, Front-Cover Texts, or Back-Cover Texts). However, these materials could only be placed if the original copyright holders did not require that they be carried forward; for that reason, they impose no special burden for reuse.