N.D. Cent. Code § 21-04-09
The treasurer of a public corporation and every other individual legally charged with the custody of public funds may accept from any financial institution, as security for repayment of deposits, a pledge of securities in lieu of a personal or surety bond. When securities are pledged to the board of any public corporation, the treasurer or other individual legally charged with the custody of public funds shall require security in the amount of one hundred ten dollars for every one hundred dollars of public deposits. Securities that are eligible for the pledge are bills, notes, or bonds issued by the United States government, its agencies or instrumentalities, all bonds and notes guaranteed by the United States government, irrevocable standby letters of credit issued by federal home loan banks of a rating of AA or better by Moody's Investors Service, Inc. or Standard & Poor's Corporation, federal land bank bonds, bonds, notes, warrants, certificates of indebtedness, insured certificates of deposit, shares of investment companies registered under the Investment Companies Act of 1940, letters of credit issued by the Bank of North Dakota, and all other forms of securities issued by the state of North Dakota, its boards, agencies, or instrumentalities, or by any county, city, township, school district, park district, or other political subdivision of the state of North Dakota, whether payable from special revenues or supported by the full faith and credit of the issuing body, and bonds issued by any other state of the United States or other securities approved by the banking board. The securities and securities sold under agreements to repurchase as described in section 21-06-07 must be delivered to and held for safekeeping by any financial institution, other than the depository, which the depository and the public corporation may agree upon. Whenever any securities are deposited for safekeeping with a custodian, the custodian shall issue a joint receipt to the depository and the public corporation.
Any financial institution pledging securities, at any time it deems it advisable or desirable, and without the consent of the board of the public corporation, may substitute other eligible securities for all or any part of the securities pledged. The securities substituted must, at the time of the substitution, have a market value at least equal to the market value of the securities released and delivered to the depository.
In the event of the substitution the holder or custodian of the pledged securities shall, on the same day, forward by mail or electronic transmission to the public corporation and the depository financial institution a receipt specifically describing and identifying both the securities substituted and those released and returned to the depository financial institution.
A depository financial institution may fulfill the pledge of securities requirements of this section by maintaining a security pledge schedule that establishes the following:
A financial institution is in compliance with this section as long as the security pledge schedule discloses the total qualified securities pledged in excess of the total pledges needed for a total amount of deposits maintained by all the public bodies with the financial institution as verified by the custodian of the securities every three months and copies are provided to the custodian of the securities and to each of the public corporations maintaining deposits with the financial institution.
No pledge of security or bond may be required for any funds deposited with a financial institution directly or by a financial institution's participation as a member of a deposit placement service to the extent that the deposits are insured or guaranteed by the federal deposit insurance corporation or the national credit union administration as determined by the commissioner of financial institutions or an insurance company that is qualified to offer excess deposit insurance in this state and which has a rating of A- or better by A.M. Best Company Inc., or the equivalent rating by another recognized rating organization as determined by the insurance commissioner.
N.D.C.C. § 21-04-09