South Dakota Codified Laws
Chapter 03 - Administration Of Oaths
Section 18-3-5 - Affirmation in lieu of oath.

18-3-5. Affirmation in lieu of oath.
Persons conscientiously opposed to swearing may affirm, and shall be subject to the penalties of perjury as in case of swearing.

Source: SL 1867-8, ch 23, §3; PolC 1877, ch 20, §2; CL 1887, §488; RPolC 1903, §727; RC 1919, §5252; SDC 1939, §48.0803.