SDCL § 32-23-4.1: Calculation of number of offenses.

Except as authorized under § 32-23-4.9, no previous conviction for, or plea of guilty to, a violation of § 32-23-1, 22-18-36, or 22-16-41 occurring more than ten years prior to the date of the violation being charged may be used to determine that the violation being charged is a second, third, or subsequent offense. Any period of time during which the defendant was incarcerated for a previous violation may not be included when calculating if the time period provided in this section has elapsed.