User's Manual

146
 Youmaychargeafeeforthephysicalactoftransferringa
copy,andyoumayatyouroptionoerwarrantyprotection
inexchangeforafee.
2. 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modicationsorworkunder
thetermsofSection1above,providedthatyoualsomeet
alloftheseconditions:
 a) Youmustcausethemodiedlestocarryprominent
noticesstatingthatyouchangedthelesandthedateof
any change.
 b) Youmustcauseanyworkthatyoudistributeorpub-
lish,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.
 c) Ifthemodied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.(Exception: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.)