SDCL § 31-12-27: Tax levy for secondary roads in unorganized territory.

Each board of county commissioners may levy annually a tax upon the taxable property within the county not included in any municipality, organized civil township, improvement district organized pursuant to chapter 7-25A, or county road district organized pursuant to chapter 31-12A, to carry out the provisions of § 31-12-26. If a county levies a tax, the tax shall be certified, become payable and delinquent, and, if not paid, shall draw interest and penalty as other county taxes. The tax shall be used for such purposes.