It is the responsibility of the application to determine if data is in the class that should be cleared when freed. Knowledge of the confidential text and encryption options in effect for a session is available to applications by examining the RPLTCRYP and RPL6CFTX fields in the RPL. To clear CSM storage, the application specifies the CLEAR parameter on an IVTCSM request.

• For an HPDT send operation, the application specifies the CLEAR parameter when it obtains the buffers on the IVTCSM REQUEST=GET_BUFFER macroinstruction.
• For an HPDT receive operation, the application specifies the CLEAR parameter when it frees the buffers on the IVTCSM REQUEST=FREE_BUFFER macroinstruction.