CNTL specification - Key = 'C003'

DINRCNTL requests the name of the JCL CNTL statement being referenced. When you code DINRCNTL, # must be one, LEN must be at least 26 and can be longer, and the PARM field is the length specified by the value in LEN.

If a CNTL statement reference exists, the system returns the name into PARM. If the name is fewer than 26 bytes long, it is left-justified and padded to the right with blanks. The system also returns 26 into LEN.

Example: To request the label of the referenced JCL CNTL statement, code:
KEY    #      LEN    PARM
C003   0001   001A   - - - ...