A compilation of the Document or its derivatives with other + separate and independent documents or works, in or on a volume of + a storage or distribution medium, does not as a whole count as a + Modified Version of the Document, provided no compilation + copyright is claimed for the compilation. Such a compilation is + called an "aggregate", and this License does not apply to the + other self-contained works thus compiled with the Document, on + account of their being thus compiled, if they are not themselves + derivative works of the Document.
If the Cover Text requirement of section 3 is applicable to + these copies of the Document, then if the Document is less than + one quarter of the entire aggregate, the Document's Cover Texts + may be placed on covers that surround only the Document within the + aggregate. Otherwise they must appear on covers around the whole + aggregate.