ISIS= parameter for procedures
Use the ISIS= parameter in procedure to specify whether resource access security checking is to be performed. Valid values are A, C, N, and R. If this parameter is not specified, the default specification is ISIS=N.
Note: 
When ODBMSECURE=N|A|E|R is specified, either
in the DFSCGxxx member of the IMS PROCLIB data set or in the COMMON_SERVICE_LAYER section of the DFSDFxxx member, the value specified for ISIS= is ignored for any ODBM connecting to the affected IMS subsystem. 
When ODBMSECURE=N|A|E|R is specified, either
in the DFSCGxxx member of the IMS PROCLIB data set or in the COMMON_SERVICE_LAYER section of the DFSDFxxx member, the value specified for ISIS= is ignored for any ODBM connecting to the affected IMS subsystem. - A
- Specifies that resource access security checking using both RACF® and a user exit routine is to be performed.
- C
- Specifies that resource access security checking using a user exit routine is to be performed.
- N
- Specifies that no resource access security is to be performed. N replaces values of 0, 1, and 2. If you specify 0, 1, or 2, the system interprets them as ISIS=N.
- R
- Specifies that resource access security checking using RACF is to be performed.
The Resource Access Security user exit (RASE), if it exists, is loaded in order to provide the extended functionality of the exit.
This parameter cannot be changed at emergency restart.