An affidavit of a financial officer of the local unit shall be a conclusive determination of the total amount of any such emergency appropriations made in any fiscal year and of the amount of all budget appropriations for such year.
If any resolution providing for the issuance of notes to meet any such emergency appropriation shall recite or determine that such appropriation was required to meet a pressing need for public expenditure to protect or promote the public health, safety, morals or welfare or to provide for temporary housing or public assistance, such recital or determination shall be deemed to be true for the purpose of determining the validity of such notes, and the local unit issuing such notes and all others interested shall forever thereafter be estopped from denying the same.