In z/OS V1R13, the program calling IEBCOPY no longer needs to be APF authorized. IEBCOPY can adapt to the lack of APF authorization. If your program calls IEBCOPY, you probably can remove APF authorization from your program, making it safer. Note: IEBCOPY is still delivered as APF authorized and tends to run slightly more efficiently when it retains APF authorization. However, it adapts to the lack of APF authorization, such as when called by an unauthorized program. 6.3.3 Installation considerations There are no changes needed to obtain the improved performance, but there may be borderline cases where there is insufficient virtual storage. Most IEBCOPY storage is below the line but now it uses buffers above the line. If your program calls IEBCOPY, you probably can remove APF authorization from your program, making it safer. As delivered by IBM, IEBCOPY still has APF authorization and it should tend to run slightly more efficiently when it retains APF authorization. However, it adapts to the lack of APF authorization, such as when called by an unauthorized program. 6.4 New catalog parmlib member support Currently, the only way to customize the catalog environment is through SYS1.NUCLEUS(SYSCATxx) and SYS1.PARMLIB(LOADxx). Only 1 line (80 characters) is