Sec.  24.  For  purposes  of  the  administration  of  justice  and  public
security,  the  authorities  may  copy  portraits  without  the  consent  of  the
person  portrayed  and  the  person  having  the  right  to  the  portrait  and
may  circulate  and  publicly  exhibit  them.
PART  III.
DURATION   OF    COPYRIGHT.
Sec.  25.  The  protection  of  copyright  in  a  work  of  plastic  art  expires
30  years  after  the  death  of  the  author.
If  the  copyright  belongs  to  a  juridical  person,  pursuant  to  Sections
5  and  6,  the  protection  ends  30  years  after  publication  of  .the  work.
Nevertheless  the  protection  ceases  with  the  expiration  of  the  period
prescribed  in  the  first  sentence,  if  the  work  is  first  published  after  the
death  of  its  creator.
Sec.  26.  The  protection  of  copyright  in  a  photographic  work  expires
ten  years  after  publication  of  the  work.  Nevertheless  the  protection
ends  ten  years  after  its  author's  death  if  the  work  had  not  been  pub-
lished at  that  time.
Sec.  27.  If  the  copyright  belongs  to  several  in  oommon,  the  death  of
the  last  survivor  furnishes  the  time  for  calculation  of  the  copyright
term,  in  so  far  as  time  of  death  determines  the  period  of  protection.
Sec.  28.  In  the  case  of  works  consisting  of  several  parts,  made  public
at  intervals,  as  well  as  in  the  case  of  continued  sheets  or  volumes,  every
part,  sheet  or  volume,  is  deemed  an  individual  work  in  calculating  the
period  of  protection.
In  the  case  of  works  published  in  installments  the  period  of  protection
is  calculated  from  the  publication  of  the  last  installment.
Sec.  29.  The  periods  of  protection  begin  with  the  expiration  of  the
calendar  year  in  which  the  author  died  or  the  work  was  published.
