Review the access authorizations for CICS system datasets for each region. Ensure they conform to the specifications below: A CICS environment may include several dataset types required for operation. Typically they are CICS product libraries, which are usually included in the STEPLIB concatenation but may be found in DD DFHRPL. CICS system datasets can be identified with DFH DD statements, other product system datasets, and application program libraries. Restrict WRITE and/or greater access to CICS program libraries and all system datasets to systems programmers only. Other access must be documented and approved by the ISSO. The site may determine access to application datasets included in the DD DFHRPL and CICS region startup JCL according to need. Ensure that procedures are established, documented, and followed that prevent the introduction of unauthorized or untested application programs into production application systems.