An obligation arising by operation of law may be either a general legal duty imposed upon all persons indifferently by law or a legal duty affixed by operation of law to a status or relationship voluntarily assumed.
S.D. Codified Laws § 20-1-3
Kinds of obligations arising by operation of law
Source: SDC 1939, § 47.0103.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.