Pre-Authorized Code Flow: When wallet must include `authorization_details` to the Token Request?

In paragraph 6.1.1
there is the following text

Credential Issuers MAY support requesting authorization to issue a Credential using the authorization_details parameter. This is particularly useful, if the Credential Issuer offered multiple Credential Configurations in the Credential Offer of a Pre-Authorized Code Flow.

From a wallet perspective, it is not clear, IMHO, when authorization_details MUST be included to the token request in Pre-Authorized Code Flow.
From the Issuer perspective, it is also not clear how will can the wallet be informed that it MUST use authorization_details in Pre-Authorized Code Flow.

For instance, taking the example from 6.2 and assuming there was a credential offer with a Pre-Authorized Code Flow

{
  "access_token": "eyJhbGciOiJSUzI1NiIsInR5cCI6Ikp..sHQ",
  "token_type": "bearer",
  "expires_in": 86400,
  "c_nonce": "tZignsnFbp",
  "c_nonce_expires_in": 86400,
  "authorization_details": [
    {
      "type": "openid_credential",
      "credential_configuration_id": "UniversityDegreeCredential",
      "credential_identifiers": [ "CivilEngineeringDegree-2023", "ElectricalEngineeringDegree-2023" ]
    }
  ]
}

• How wallet would know that it should include authorization_details to the token request (to receive such a response)?
• The same question can be put also from the Issuer side: In which way issuer conveys to the wallet that it must use authorization_details for a specific credential_configuration_id?

PS: In the authorization code flow, the absence/presence of a scope in the credential_configuration_id meta-data could be used as a hint. If scope is missing probably authorization_details should be used.

Start with paragraph 6.1.1 and the example in section 6.2, then trace the Pre-Authorized Code Flow requirements for the wallet and issuer. Review the four existing comments for decisions or proposed interpretations. Done means the specification clearly states when authorization_details is required and how that requirement is conveyed to the wallet.