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# isRequired

Whether the assessment requires this executable. Defaults to `NO`.

```
var isRequired: Bool { get set }
```

## Discussion

Governs what happens when the executable cannot be enforced — for example, when signature
validation fails under [`allowsOnlyParticipantsToRun`](/documentation/AutomaticAssessmentConfiguration/AEAssessmentConfiguration/allowsOnlyParticipantsToRun). A non-required
participant is silently dropped; a required one prevents the session from beginning.

> SeeAlso: ``doc://com.apple.automaticassessmentconfiguration/documentation/AutomaticAssessmentConfiguration/AEAssessmentBinaryExecutable/requiresSignatureValidation``.

---

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