While not called out as clearly as it could be, Example 1 lists “all parameters that are required or expected” and INDIC is included. This is born out indirectly in Assumption 15, showing the null flavor usage when INDIC is not applicable.
I’ll check to see if this is already called out for the 3.3 changes, and if not, propose the table reference in Example 1 be be included under the assumptions for TS to identify required/expected parameters.
Another issue is that the null flavor a may not be taken into account by the validator. If that is the case, you can document in the SDRG.
Regards,
Carlo