That would be X-1a or X-3? Either limit you to Acrobat 5 reader according to the Word/PDFMaker from Acrobat.
At 10:55 AM 10/3/2009, muehleisen wrote:
You should generate documents in PDF/X, the ISO standard archival PDF format that is specifically designed for archival documentation. It can be read by nearly every reader, new or old.
All the recent versions of Adobe tools and most other third party tools will generate PDF/X