To allow TRANSMIT and RECEIVE access to the NAMES data set from any security label, the installation-defined NAMES data sets must be allocated with a SECLABEL of SYSLOW. For more information, see Allocating NAMES and log data sets.

If security label checking determines a receiving user is never authorized for the proper security label, the data set may be deleted. The two JES exits (Exit 38 for JES2, IATUX60 for JES3) can be written to hold or reroute data sets that would otherwise be deleted.