+<P>If you publish printed copies of the Document numbering more
+than 100, and the Document's license notice requires Cover Texts,
+you must enclose the copies in covers that carry, clearly and
+legibly, all these Cover Texts: Front-Cover Texts on the front
+cover, and Back-Cover Texts on the back cover. Both covers must
+also clearly and legibly identify you as the publisher of these
+copies. The front cover must present the full title with all
+words of the title equally prominent and visible. You may add
+other material on the covers in addition. Copying with changes
+limited to the covers, as long as they preserve the title of the
+Document and satisfy these conditions, can be treated as verbatim
+copying in other respects.
+<P>If the required texts for either cover are too voluminous to
+fit legibly, you should put the first ones listed (as many as fit
+reasonably) on the actual cover, and continue the rest onto
+adjacent pages.
+<P>If you publish or distribute Opaque copies of the Document
+numbering more than 100, you must either include a
+machine-readable Transparent copy along with each Opaque copy, or
+state in or with each Opaque copy a publicly-accessible
+computer-network location containing a complete Transparent copy
+of the Document, free of added material, which the general
+network-using public has access to download anonymously at no
+charge using public-standard network protocols. If you use the
+latter option, you must take reasonably prudent steps, when you
+begin distribution of Opaque copies in quantity, to ensure that
+this Transparent copy will remain thus accessible at the stated
+location until at least one year after the last time you
+distribute an Opaque copy (directly or through your agents or
+retailers) of that edition to the public.
+<P>It is requested, but not required, that you contact the
+authors of the Document well before redistributing any large
+number of copies, to give them a chance to provide you with an
+updated version of the Document.
+<H2><A NAME="ss4.5">4.5 MODIFICATIONS</A>
+ </H2>
+
+<P>You may copy and distribute a Modified Version of the
+Document under the conditions of sections 2 and 3 above, provided
+that you release the Modified Version under precisely this
+License, with the Modified Version filling the role of the
+Document, thus licensing distribution and modification of the
+Modified Version to whoever possesses a copy of it. In addition,
+you must do these things in the Modified Version:
+<P>
+<UL>
+<LI>Use in the Title Page
+(and on the covers, if any) a title distinct from that of the
+Document, and from those of previous versions (which should, if
+there were any, be listed in the History section of the
+Document). You may use the same title as a previous version if
+the original publisher of that version gives permission.</LI>
+<LI>List on the Title Page,
+as authors, one or more persons or entities responsible for
+authorship of the modifications in the Modified Version,
+together with at least five of the principal authors of the
+Document (all of its principal authors, if it has less than
+five).</LI>
+<LI>State on the Title page
+the name of the publisher of the Modified Version, as the
+publisher.</LI>
+<LI>Preserve all the
+copyright notices of the Document.</LI>
+<LI>Add an appropriate
+copyright notice for your modifications adjacent to the other
+copyright notices.</LI>
+<LI>Include, immediately
+after the copyright notices, a license notice giving the public
+permission to use the Modified Version under the terms of this
+License, in the form shown in the Addendum below.</LI>
+<LI>Preserve in that license
+notice the full lists of Invariant Sections and required Cover
+Texts given in the Document's license notice.</LI>
+<LI>Include an unaltered
+copy of this License.</LI>
+<LI>Preserve the section
+entitled "History", and its title, and add to it an item stating
+at least the title, year, new authors, and publisher of the
+Modified Version as given on the Title Page. If there is no
+section entitled "History" in the Document, create one stating
+the title, year, authors, and publisher of the Document as given
+on its Title Page, then add an item describing the Modified
+Version as stated in the previous sentence.</LI>
+<LI>Preserve the network
+location, if any, given in the Document for public access to a
+Transparent copy of the Document, and likewise the network
+locations given in the Document for previous versions it was
+based on. These may be placed in the "History" section. You
+may omit a network location for a work that was published at
+least four years before the Document itself, or if the original
+publisher of the version it refers to gives permission.</LI>
+<LI>In any section entitled
+"Acknowledgements" or "Dedications", preserve the section's
+title, and preserve in the section all the substance and tone of
+each of the contributor acknowledgements and/or dedications
+given therein.</LI>
+<LI>Preserve all the
+Invariant Sections of the Document, unaltered in their text and
+in their titles. Section numbers or the equivalent are not
+considered part of the section titles.</LI>
+<LI>Delete any section
+entitled "Endorsements". Such a section may not be included in
+the Modified Version.</LI>
+<LI>Do not retitle any
+existing section as "Endorsements" or to conflict in title with
+any Invariant Section.</LI>
+</UL>
+<P>
+<P>If the Modified Version includes new front-matter sections
+or appendices that qualify as Secondary Sections and contain no
+material copied from the Document, you may at your option
+designate some or all of these sections as invariant. To do this,
+add their titles to the list of Invariant Sections in the Modified
+Version's license notice. These titles must be distinct from any
+other section titles.
+<P>You may add a section entitled "Endorsements", provided it
+contains nothing but endorsements of your Modified Version by
+various parties--for example, statements of peer review or that
+the text has been approved by an organization as the authoritative
+definition of a standard.
+<P>You may add a passage of up to five words as a Front-Cover
+Text, and a passage of up to 25 words as a Back-Cover Text, to the
+end of the list of Cover Texts in the Modified Version. Only one
+passage of Front-Cover Text and one of Back-Cover Text may be
+added by (or through arrangements made by) any one entity. If the
+Document already includes a cover text for the same cover,
+previously added by you or by arrangement made by the same entity
+you are acting on behalf of, you may not add another; but you may
+replace the old one, on explicit permission from the previous
+publisher that added the old one.
+<P>The author(s) and publisher(s) of the Document do not by
+this License give permission to use their names for publicity for
+or to assert or imply endorsement of any Modified Version.
+<H2><A NAME="ss4.6">4.6 COMBINING DOCUMENTS</A>
+ </H2>