EXEC CICS processing
The primary BLLs used with SET options are replaced by corresponding
ADDRESS OF special register. For example:
EXEC CICS READ ... SET(BLL1) ...
is replaced by: EXEC CICS READ ... SET(ADDRESS OF REC1) ...
The statements involved are:
- CONVERSE
- GETMAIN
- ISSUE RECEIVE
- LOAD
- POST
- READ
- READNEXT
- READPREV
- READQ
- RECEIVE
- RETRIEVE
- SEND CONTROL
- SEND PAGE
- SEND TEXT
The primary BLLs used with CICS® ADDRESS statements are replaced by the corresponding Enterprise COBOL ADDRESS OF special register.
For example: 

EXEC CICS TWA(BLL).
is
replaced by: 
EXEC CICS ADDRESS TWA (ADDRESS OF TWA).

The options involved are: CSA, CWA, EIB, TCTUA, and TWA.