<sect2 id="gpl-terms-and-conditions-section-2" xreflabel="Section 2">

    <title>Section 2</title>

    <para>You may modify your copy or copies of the Program or any

    portion of it, thus forming a work based on the Program, and copy

    and distribute such modifications or work under the terms of

    Section 1 above, provided that you also meet all of these

    conditions:</para>

    <orderedlist numeration="loweralpha">

        <listitem>

            <para>You must cause the modified files to carry prominent

            notices stating that you changed the files and the date of

            any change.</para>

        </listitem>

        <listitem>

           <para>You must cause any work that you distribute or

           publish, that in whole or in part contains or is derived

           from the Program or any part thereof, to be licensed as a

           whole at no charge to all third parties under the terms of

           this License.</para>

        </listitem>

        <listitem>

            <para>If the modified program normally reads commands

            interactively when run, you must cause it, when started

            running for such interactive use in the most ordinary way,

            to print or display an announcement including an

            appropriate copyright notice and a notice that there is no

            warranty (or else, saying that you provide a warranty) and

            that users may redistribute the program under these

            conditions, and telling the user how to view a copy of

            this License.  

            <note>

                <title>Exception</title>

                <para>

                  If the Program itself is interactive but does not

                  normally print such an announcement, your work based

                  on the Program is not required to print an

                  announcement.

                </para>

            </note>

            </para>

        </listitem>

    </orderedlist>

    <para>These requirements apply to the modified work as a whole.

    If identifiable sections of that work are not derived from the

    Program, and can be reasonably considered independent and separate

    works in themselves, then this License, and its terms, do not

    apply to those sections when you distribute them as separate

    works.  But when you distribute the same sections as part of a

    whole which is a work based on the Program, the distribution of

    the whole must be on the terms of this License, whose permissions

    for other licensees extend to the entire whole, and thus to each

    and every part regardless of who wrote it.</para>

    <para>Thus, it is not the intent of this section to claim rights

    or contest your rights to work written entirely by you; rather,

    the intent is to exercise the right to control the distribution of

    derivative or collective works based on the Program.</para>

    <para>In addition, mere aggregation of another work not based on

    the Program with the Program (or with a work based on the Program)

    on a volume of a storage or distribution medium does not bring the

    other work under the scope of this License.</para>

</sect2>