Which are states that you can make a field on a form using UI Policy?

UI Policies allow administrators to control field states, including making fields 'read-only' to prevent editing.

"write-only" is not a standard field state option directly controllable by UI Policies; fields are either editable or read-only.

"Necessary" is not a defined field state in UI Policies; "Mandatory" is the correct term for requiring input.

UI Policies provide the functionality to make fields 'mandatory', requiring user input before a form can be submitted.

"Empty" describes the content of a field, not a state that a UI Policy applies to the field itself.

UI Policies can 'hide' fields from the form view entirely, based on defined conditions, without requiring custom scripting.