In connection with the issuance of any bonds under this chapter, and in order to secure the payment of any such bonds and the interest thereon, the board shall have the power for each such institution to covenant that so long as any of the bonds issued under this chapter shall remain outstanding and unpaid, it will not, except upon such terms and conditions as may be determined, voluntarily create or cause to be created any debt, lien, mortgage, pledge, assignment, encumbrance, or other charge having priority to the lien of the bonds issued under this chapter upon any of the income and revenues derived from:
SDCL 13-51A-18