Protection for ISO/ANSI/FIPS version 3 tapes

To control access to an ISO/ANSI/FIPS Version 3 tape data set, code:
  
   //ddname  DD  ACCODE=access-code,...  

The system must contain an installation-written file-access exit routine. This routine verifies that the ACCODE parameter specifies the correct code for an existing data set and, therefore, can use a data set.

Examples:
  
//DD1   DD  DSNAME=NEWDS,ACCODE=F,LABEL=(,AL),UNIT=3380,  
//      VOLUME=SER=998877,DISP=(NEW,CATLG,KEEP)  
  
//DD2   DD  DSNAME=OLDDS,ACCODE=J,LABEL=(,AL),UNIT=3380,  
//      VOLUME=SER=665544,DISP=OLD