Indexing Subsidiaries and their email domains

Hello,

What is the policy for addition of subsidiaries to the OSCI index ?
Is it a decision of parent company or of EPAM/OSCI on how to list the email domains ?

Should all subsidiaries of a company be under same umbrella (and index calculation) of parent company
OR
For each subsidiary with a different email domain, a new company addition (and index calculation) with a subsidiary name should be made ?

For example, a company "X" has 2 subsidiaries "Y" and "Z"

Option A:
```
company: X
domains:
- X.com
- Y.com
- Z.com
```

Option B:
```
company: X
domains:
- X.com

company: Y
domains:
- Y.com

company: Z
domains:
- Z.com
```

Which would be acceptable ?