Method 1: Displacement

DSCBUSRDxxx

System parameter- The displacement of the user code in the DSCB must be specified as the xxx value. The default value is 000.

USRCDLENxx

System parameter- The length of the user code in the DSCB must be specified as the xx value. The default (and maximum allowed) is 12.

When the value of the displacement is zero, an attempt is made to find a user code in member USERCODT of the parmlib data set.
If the displacement is non-zero, the member is never inspected.