S.D. Codified Laws § 1-16A-39
The bonds may be issued as serial bonds or as term bonds or a combination of both types. Such bonds may be executed and delivered by the authority at any time and from time to time, may be in such form and denominations and of such terms and maturities, may be in fully registered form or in bearer form registrable either as to principal or interest or both, may bear such conversion privileges and be payable in such installments and at such time or times not exceeding forty years from the date thereof, may be payable at such place or places whether within or without the State of South Dakota, may bear interest at such rate or rates per annum as shall be determined by the authority and without regard to any interest rate limitation appearing in any other law, payable at such time or times and at such place or places and evidenced in such manner, may be executed by such officers of the authority, either manually or by facsimile, and coupon bonds shall have attached thereto interest coupons bearing the facsimile signature of the treasurer of the authority, and may contain such provisions not inconsistent herewith, all as shall be provided in the resolutions of the authority whereunder the bonds shall be authorized to be issued or as shall be provided in a trust indenture authorized by the authority.
SDCL 1-16A-39