The Rule of 78 as defined in § 54-3A-8 may not be used in any consumer installment sales contract. The Rule of 78 may, however, be used to compute the unearned premium on insurance.
S.D. Codified Laws § 54-3A-8.1
Restriction on use of rule
Source: SL 1984, ch 320, § 1.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.