---
sourceDocument: Xanadu ServiceNow AI Platform Administration
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/xanadu/platform-administration
Release :
- xanadu
ft:locale :
- en-US
ft:publication_title :
- Xanadu ServiceNow AI Platform Administration
ft:clusterId :
- platadm
bundleId :
- platadm
workflow :
- Platform
---
# Grandfathered and exempted tables
# Grandfathered and exempted tables {#ariaid-title1}
* Release version: Xanadu
*
* Updated August 1, 2024
*
*  2 minutes to read
Grandfathered and exempted custom tables are treated differently than other custom tables on your instance. Please refer to your organization's ServiceNow® contract for additional information.
## Grandfathered tables {#grandfathered-and-exempt-tables-v2__section_hhx_zt1_3nb}
Depending on your organization's legacy subscription entitlements and contractual migration, grandfathered tables may be allotted to your production instance. To preserve an organization's previous custom table entitlements
through the license migration, a grandfathered table entitlement may be provided to the production instance. This one-time process ensures that custom tables that currently exist in a production instance don't count against your
new custom table entitlements.
Grandfathered custom tables may not be transferred, reused, or otherwise classified as another custom table type. If you delete a grandfathered custom table, you can't classify any other custom table as a grandfathered custom
table to take its place. Once a custom table has been associated with a grandfathered table subscription, it remains in the Custom Table Inventory even if the table is deleted from the instance.
To view your grandfathered tables, enter ua_custom_table_inventory.list in the filter navigator, and then add a filter with the condition \[Allotment type\] \[is\] \[Grandfather\].
If you have a combination of custom tables and grandfathered tables in one application, the grandfathered tables must be mapped to a grandfathered table subscription and the remaining custom tables to one other subscription.
Open a case with Customer Service and Support for help with mapping a grandfathered table to a grandfather table subscription.
## Grandfathered tables on an instance {#grandfathered-and-exempt-tables-v2__example_prf_ky1_3nb}
Scenario: Your organization purchases three new subscriptions with entitlements for a total of 55 App Engine Starter custom tables (formerly Bundled Custom Tables). To ensure your organization doesn't lose the previous custom
table entitlements, a grandfather subscription with an entitlement for 25 grandfathered tables is allotted to your instance. This subscription requires the admin to identify and map the existing 25 tables. These subscriptions
result in a total custom table entitlement of 80. Once a custom table has been assigned to the grandfather subscription there is no option to revert this.
{#grandfathered-and-exempt-tables-v2__table_qrf_ky1_3nb__entry__3}
| Subscription | Number of custom table entitlements | Number of mappable tables |
|:-:|:-:|:-:|
| Grandfathered subscription | 25 | 25 |
| New Subscription 1 | 25 | 25 |
| New Subscription 2 | 25 | 25 |
| New Subscription 3 | 5 | 5 |
[Table 1. Multiple subscriptions with grandfathered and custom table entitlements]
{#grandfathered-and-exempt-tables-v2__table_qrf_ky1_3nb}
## Exempted tables {#grandfathered-and-exempt-tables-v2__section_jfz_ky1_3nb}
Exempted tables are custom tables that do not count towards your subscription entitlements. These tables consist mostly of custom extensions of certain system-related tables, such as sys_portal_page and sys_user_preference, that
you extend for operational improvements in your production instance.
To view a list of exempted tables, enter ua_exempted_table_inventory.list in the filter navigator.
The [Custom Table Guide legal schedule](https://www.servicenow.com/content/dam/servicenow-assets/public/en-us/doc-type/legal/custom-table-guide.pdf) provides the complete definition of which tables are considered exempt.
Note:
Legal schedules are enforced based on when the contract is executed.
To find past versions of the Custom Table Guide, see the [Legal Schedules Custom Table Guide](https://www.servicenow.com/schedules-archived.html).