In the year that any advance refunding occurs, which of the following disclosures is not required by GAAP?

a. Difference in debt service requirements of the old defeased issue and new issue, adjusted for any additional cash paid or received.

b. Difference between the present value of the new issue’s debt service requirements and the old defeased issue’s debt service requirements.

c. Any clarification necessary concerning whether the defeasance was a legal defeasance or an in-substance defeasance.

d. Identity of the escrow agent managing the irrevocable trust established to service the old defeased issue’s debt service requirements.