(1) In addition to the powers specified in section 32-1-1101, the board of any tunnel district has the following powers for and on behalf of such district:

(a) To fix and from time to time increase or decrease tolls or other charges for the use of any tunnel and to pledge the same for the payment of principal of and interest and any prior redemption premium on any securities or other obligations of the tunnel district issued in connection with the acquisition, construction, improvement, equipping, operation, maintenance, or financing of a tunnel located in whole or in part within such tunnel district;

(b) To issue without an election, pursuant to an authorizing resolution and subject to the provisions and contractual limitations and resolutions authorizing outstanding bonds and other securities of the tunnel district, securities to defray, in whole or in part, the costs of one or more tunnel projects in the manner provided in and subject to the limitations imposed by subsection (2) of this section;

(c) To invest or deposit moneys belonging to or collected by and on behalf of the tunnel district in accordance with the requirements established in part 6 of article 75 of title 24, C.R.S. In addition, a tunnel district may direct a corporate trustee which holds funds of the tunnel district to invest or deposit such funds in investments or deposits other than those specified by said part 6 if the board determines by resolution that such investments or deposits meet the standard established in section 15-1-304, C.R.S., if the income is at least comparable to income available on investments or deposits specified by said part 6, and if such investments will assist the tunnel district in the acquisition, construction, improvement, equipping, operation, maintenance, or financing of a tunnel.

(2) (a) (I) The tunnel project for which securities are issued pursuant to paragraph (b) of subsection (1) of this section may be the acquisition, construction, improvement, equipping, operation, or maintenance, or any combination thereof, of any land, tunnel, building, structure, equipment, or other property necessary or desirable for use in connection with the operations of a tunnel district.

(II) The cost of the project may include, in the board's discretion, all incidental costs pertaining to the project and the financing thereof, including, without limitation, contingencies and the capitalization, with proceeds of securities, of operation and maintenance expenses appertaining to the tunnel project and interest on the securities for any period not exceeding the period estimated by the board to effect the acquisition, construction, improvement, or equipping of the tunnel project plus one year, of any discount on the securities, and of any reserves for payment of principal of and interest on the securities.

(b) The board may issue interim securities, which may be designated "bonds", "notes", or "warrants", evidencing any emergency loans, any acquisition, construction, improvement, equipping, operation, or maintenance loans, and any other temporary loans not exceeding three years in supplementation of long-term financing, such interim securities to be funded with the proceeds of long-term securities, net pledged revenues, or further interim securities, or any combination thereof, as the board may determine.

(c)

(I) Except to the extent inconsistent with the provisions of this section, any securities issued pursuant to this section for any tunnel project shall be issued in the form and manner and with the effect provided in sections 11-54-111 and 11-54-112, C.R.S., for public securities issued under the "Refunding Revenue Securities Law", article 54 of title 11, C.R.S.

(II) The authorizing resolution, trust indenture, or other instrument appertaining thereto may contain any of the covenants, and the board may do such acts and things, as are permitted in section 11-54-113, C.R.S.

(III) Revenue obligations issued to refund revenue bonds of a tunnel district and to refund securities issued under this section may be issued under the "Refunding Revenue Securities Law", article 54 of title 11, C.R.S.

(d) The securities shall be payable and collectible, as to principal, interest, and any prior redemption premium, solely out of net pledged revenues, and the holder thereof may not look to any general or other fund for such payment of such securities except the net revenues pledged therefor. The securities shall not constitute an indebtedness or a debt within the meaning of any constitutional or statutory provision or limitation if any such provision or limitation appertains thereto. The securities shall not be considered or held to be general obligations of the tunnel district but shall constitute its special obligations, and the full faith and credit of the tunnel district shall not be pledged for their payment. Such payment shall not be secured by an encumbrance, a mortgage, or any other pledge of property of the tunnel district, except for its pledged revenues. No property of the tunnel district, subject to said exception, shall be liable to be forfeited or taken in payment of securities.

(e) A resolution providing for the issuance of bonds or other securities under this section or an indenture or other proceedings appertaining thereto may provide that the securities contain a recital that they are issued pursuant to this section, which recital shall be conclusive evidence of their validity and the regularity of their issuance.

(f) The determination of the board that the limitations imposed under this subsection (2) upon the issuance of securities under this section have been met shall be conclusive in the absence of fraud or arbitrary and gross abuse of discretion, regardless of whether the authorizing resolution or the securities thereby authorized contain a recital as authorized by paragraph (e) of this subsection (2).

(g) Bonds and other securities issued under the provisions of this section, their transfer, and the income therefrom shall forever remain free and exempt from taxation by this state or any political subdivision thereof.

(h)

(I) Except as otherwise expressly provided in this section, this section, without reference to other statutes of this state, constitutes full authority for the exercise of the incidental powers granted in this section concerning the borrowing of money to defray, in whole or in part, the cost of any tunnel project and the issuance of securities to evidence such loans.

(II) The powers conferred by this section are in addition and supplemental to and not in substitution for, and the limitations imposed by this section shall not affect, the powers conferred by any other law.

(III) Nothing in this section shall be construed as preventing the exercise of any power granted to the board or to a tunnel district acting by and through its board or any officer, agent, or employee thereof by any other law.

(3) The state hereby pledges and agrees with the holders of any bonds or other obligations issued by any tunnel district that the state will not limit, alter, restrict, or impair the rights vested in the tunnel district to fulfill the terms of any agreements made with the holders of bonds or other securities authorized and issued pursuant to the provisions of this section. The state further agrees that it will not in any way impair the rights or remedies of the holders of any bonds or securities of the tunnel district until such bonds or securities have been paid or until adequate provision for payment thereof has been made. The tunnel district may include this provision and undertaking of the state in such bonds or other securities.