S.D. Codified Laws § 32-23-13 (2026)
If any operator of a motor vehicle in this state who has been requested to submit to a chemical test fails to invoke the provision in § 32-23-11 which permits him to refuse to submit to a test, then the failure to invoke the provision permitting a refusal to submit to a test shall constitute consent and authority to administer a test notwithstanding the age of the operator of the motor vehicle.
Source: SL 1959, ch 264 , § 5; SDC Supp 1960, § 44.0302-2; SL 1971, ch 193 , § 1; SL 1982, ch 246 , § 4.