ISA99.02.01 was approved by ANSI as an American National Standard on 13 January 2009. It has now been submitted to IEC65 WG10 for the IEC process. Individuals who are members of ISA may download the standard at no charge for your individual use.
If you aren't a member of ISA, this is an excellent reason to join. You'll save the entire amount of your membership in that one transaction.