//TAPE   DD  UNIT=3390,VOLUME=SER=T49850,DSNAME=TAPEDS,
//         LABEL=(,AL),ACCODE=Z

In this example, the DD statement ACCODE parameter specifies an accessibility code of Z for tape volume T49850. The volume has ISO/ANSI/FIPS Version 3 or ISO/ANSI Version 4 labels. The data set TAPEDS is first on the tape.