Each trust indenture, or an executed counterpart thereof, shall be filed in the office of the secretary of state. The filing of a trust indenture, or an executed counterpart thereof, in the office of the recorder of the county in which the property covered by said trust indenture is located shall constitute constructive notice of the contents thereof to all persons from the time of such filing, and no recording of such trust indenture or the contents thereof shall be necessary.
61-02-61. Resolution or indenture may contain provisions protecting bondholders - Expenses incurred in carrying out indenture. Either the resolution providing for the issuance of bonds or the trust indenture may contain such provisions for protecting and enforcing the rights and remedies of the bondholders as may be reasonable and proper. No enumeration of particular powers granted may be construed to impair any general grant of power contained in this chapter. All expenses incurred in carrying out the provisions of the resolution or trust indenture may be treated as a part of the cost of maintenance, operation, and repair of the works affected by the resolution or trust indenture.