The VSE Librarian sublibraries specified on the SETSYS AUTHCLIB and SETSYS AUTHELIB commands are considered REXX/CICS authorized sublibraries. If multiple sublibraries are specified, they are searched in the order specified in the command.
The sublibrary in the LIBDEF PROC search chain for the CICS partition containing the member CICSTART.PROC used to initialize REXX/CICS is treated as the initial authorized sublibrary. This can then be changed by using the SETSYS AUTHCLIB and SETSYS AUTHELIB commands.