---
sourceDocument: Brazil IT Service Management
sourceDocumentLink: https://www.servicenow.com/docs/r/it-service-management

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    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil IT Service Management

ft:clusterId :

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bundleId :

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workflow :

    - Technology


---

# Add state field policies to a change model state

# Add state field policies to a change model state {#ariaid-title1}

Release version: Brazil  
Updated September 29, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Make change request fields mandatory or read-only in a specific state of a change model by adding state field policies to the model state.

## Before you begin

The change model and its states must exist before you add policies. To set up model states, see [Configure change model states](https://www.servicenow.com/docs/oVxkd1~Covg22_D_vx4MAg "Configure states for change models and define transition between multiple states.").

Role required: none.  
Note:  
Write access to the change model is required to add state field policies to the model state.

## About this task

Each policy controls one field in one state. To control multiple fields, add one policy per field.

## Procedure

1. Navigate to AllChangeAdministrationChange Models.
2. Select the change model to update.
3. In the Model States related list, select the state to add field policies to.
4. In the State Field Policies related list, select New.
5. On the State Field Policy form, fill in the fields.  
   {#define-state-field-policies__table-state-field-policy-form__entry__2}

   | Field | Description |
   |-|-|
   | Name | Change request field that the policy applies to. The list shows fields from the table that the change model is based on. |
   | Mandatory | Option that requires a value in the field while the change request is in this state. Selecting this check box also adds the field to a State Field Policy Managed transition condition on every transition into this state. |
   | Read Only | Option that blocks changes to the field while the change request is in this state. |
   | Application | Application scope that owns the policy. Controls which application the policy is associated with for update set tracking. |
   | Active | Option that applies the policy to change requests in this state. Selected by default. Note: Select the Active check box to activate the policy. A field can be marked as mandatory, read-only, or both for the same state. |
   [Table 1. State Field Policy form]

   {#define-state-field-policies__table-state-field-policy-form}
6. Select Submit.

## Result

The policy is active for change requests that use the model when they're in the selected state. If you selected Mandatory, change requests can't move into the state until the field has a value.

## What to do next

Open a record that uses this change model and set its state to the state that you configured. The field that you selected now appears as mandatory or read-only on the form.

If the field is mandatory, the system also creates or updates a State Field Policy Managed transition condition on every model state transition that leads into that state. For more information, see [State field policies for change models](https://www.servicenow.com/docs/WB6jVbvdk~~ZSioKo_aUGQ "Use state field policies to make change request fields mandatory or read-only at each state in a change model. Policies are enforced on the form when a change request is created or updated.").
**Related concepts**   

* [State field policies for change models](https://www.servicenow.com/docs/WB6jVbvdk~~ZSioKo_aUGQ "Use state field policies to make change request fields mandatory or read-only at each state in a change model. Policies are enforced on the form when a change request is created or updated.")  
**Related reference**   

* [Default state field policies in base system change models](https://www.servicenow.com/docs/CRBX_0BQIphQo986fE8QIA "The Change Management - Change Model Foundation Data plugin (com.snc.change_management.change_model.foundation) includes state field policies for the base system change models. All default policies make fields mandatory only.")

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