How You Allow Dynamic Determination of the Need for Migration IDs

You can allow dynamic determination of the need for a migration ID as follows:

By issuing a SYSCMD command with the MIGID operand set to MIGID=EXIT.
Specifying this operand, with some command text, causes your region to invoke its internal migration ID determination exit. Optionally, your region can invoke a user-written exit that can override the internal exit decision.
By using the NCL &AOMMIGID built-in function, in the format:
```
&result = &AOMMIGID command-string
```
The return value from the function is YES or NO, indicating whether the command needs a migration ID.

Note: For more information about the &AOMMIGID built-in function, see the Network Control Language Reference Guide.

Note: The region always acts as if NO is specified under the following conditions: