You can start CICS® IA from a program list table (PLT) program that is initiated during the third stage of CICS initialization; that is, a program that is specified in the second part of the program list table post initialization (PLTPI) list for the CICS region.
DFHPLT TYPE=ENTRY,PROGRAM=DFHDELIM
DFHPLT TYPE=ENTRY,PROGRAM=CIUSTART
DFHPLT TYPE=ENTRY,PROGRAM=CIUSTOP
DFHPLT TYPE=ENTRY,PROGRAM=DFHDELIM
For definitive information about installing and running PLTPI and PLTSD programs, see the CICS Customization Guide.