The authority may issue its bonds for the purpose of refunding bonds then outstanding, including the payment of redemption premiums and interest accrued or to accrue to the date of redemption of the outstanding bonds. Until the proceeds of the bonds issued for the purpose of refunding outstanding bonds are applied to the purchase or retirement of the outstanding bonds or the redemption of the outstanding bonds, the proceeds may be placed in escrow and be invested and reinvested. The interest, income and profits, if any, earned or realized on an investment may, in the discretion of the authority, also be applied to the payment of the outstanding bonds to be refunded by purchase, retirement or redemption, as the case may be. After the terms of the escrow have been fully satisfied and carried out, a balance of proceeds and interest, if any, earned or realized on the investments of proceeds and interest may be returned to the authority for use by it in a lawful manner. Refunding bonds shall be issued and secured and shall be subject to the provisions of the New Mexico Exposition Center Authority Act in the same manner and to the same extent as any other bonds issued pursuant to the New Mexico Exposition Center Authority Act.