By the effective date of sale or conveyance, the nonprofit corporation shall place into an escrow fund money or direct obligations of, or obligations the principal of and interest on which, are unconditionally guaranteed by the United States of America (as approved by the Local Government Commission), the principal of and interest on which, when due and payable, will provide sufficient money to pay the principal of and the interest and redemption premium, if any, on all bonds then outstanding to the maturity date or dates of such bonds or to the date or dates specified for the redemption thereof. The nonprofit corporation shall furnish to the Local Government Commission such evidence as the Commission may require that the securities purchased will satisfy the requirements of this section. A hospital which has placed funds in escrow to retire outstanding general obligation or revenue bonds, as provided in this section, shall not be considered a public hospital, and G.S. 159-39(a)(3) shall be inapplicable to such hospitals.
N.C. Gen. Stat. § 131E-8