N.D. Cent. Code § 23-30-07
The board of directors shall annually estimate the probable expense for operating the hospital district. The estimate must be certified by the president and secretary to the proper county auditor or county auditors, on or before June thirtieth of each year. In the year for which the levy is sought, the board of directors of a hospital district seeking approval of a property tax levy under this chapter must file with the county auditor of each county within the hospital district, at a time and in a format prescribed by the county auditors, a financial report for the preceding calendar year showing the ending balances of each fund held by the hospital district during that year. The auditor or auditors may levy a tax not exceeding the limitation in section 57-15-26.4 for the maintenance of the district for the fiscal year as provided by law. The tax must be:
The amount of the tax levy may not exceed the amount of funds required to defray the expenses of the district for a period of one year as embraced in the annual estimate of expense including the amount of principal and interest upon the indebtedness of the district for the ensuing year.
Voter-approved levy authority under this section or section 23-18-01 authorized by electors of a county before January 1, 2015, remains in effect through taxable year 2024 or for the time period authorized by the electors, whichever expires first. After January 1, 2015, approval or reauthorization by electors of voter-approved levy authority under this section may not be effective for more than ten taxable years.
N.D.C.C. § 23-30-07