How ACV is determined, whether labor cost can be depreciated, and the rules on releasing withheld recoverable depreciation.
Actual Cash Value rule
Broad evidence rule / fair-negotiation standard (resolved: the case is real; an earlier pass had it as an unverifiable citation)
A third research pass (specifically hunting for a free link to this case's opinion text) found and read it directly: the party name is 'Aetna,' not 'Etna' (an OCR/transcription variant that had made the citation unfindable in two earlier passes). The North Dakota Supreme Court held ACV is 'the sum which, considering all the circumstances, could have been obtained for it; that is, the amount that in all probability would have been arrived at by fair negotiations between an owner willing to sell and a purchaser desiring to buy': a broad evidence rule allowing the jury to weigh property character, age, condition, location, community demand, profitability, salability and all other relevant circumstances, rather than a fixed formula. The court also held jurors may apply their own business experience and common knowledge, not just expert testimony. What is solid: North Dakota's separate valued-policy law makes the face policy amount conclusive for a total loss of real property; the case above governs partial losses.
Citation: Butler v. Aetna Ins. Co., 64 N.D. 764, 256 N.W. 214 (N.D. 1934); N.D. Cent. Code § 26.1-39-05 (valued policy law, total losses only)
Source: https://law.justia.com/cases/north-dakota/supreme-court/1934/64-nd-764.html
This entry was substantially revised after two rounds of prior review had flagged this citation as likely erroneous/unverifiable; it turned out to be a real, correctly-decided case, just misspelled in the sources those earlier passes relied on ('Etna' instead of 'Aetna'). The opinion was read directly (not via a secondary summary) to confirm the holding quoted above.
ACV statute or regulation
No North Dakota insurance-code statute or regulation was found that statutorily defines the ACV calculation method or restricts depreciation of labor.
North Dakota's principal unfair claims practices statute, N.D. Cent. Code 26.1-04-03 (the state's version of the NAIC Unfair Trade Practices Act), lists prohibited claims-handling conduct but does not contain a specific formula for actual cash value or any provision addressing depreciation of labor versus materials. No companion North Dakota Administrative Code rule defining ACV (comparable to Ohio's 3901-1-54 or Rhode Island's 230-RICR-20-40-2.9) was located. The state's ACV rule remains the common-law fair market value approach from Butler v. Aetna Ins. Co., 256 N.W. 214 (N.D. 1934), which is a separate case-law matter already reflected in the site's common-law acv field, not a statute.
Citation: N.D. Cent. Code 26.1-04-03 (reviewed; contains no ACV or labor-depreciation provision)
Source: https://codes.findlaw.com/nd/title-26-1-insurance/nd-cent-code-sect-26-1-04-03/
Searched N.D. Cent. Code Title 26.1 and the North Dakota Administrative Code insurance title for an ACV-defining rule; none was found. This is reported as a genuine gap, not a fabricated absence.
Recoverable depreciation holdback
No North Dakota statute or regulation specifically governing the timing of a recoverable-depreciation holdback, or the depreciation of labor specifically, was found.
The North Dakota Department of Insurance confirmed orally (per a secondary legal survey) that no applicable statute, administrative code provision, or case law exists on this topic. This appears to be governed by individual policy terms.
Source: https://www.mwl-law.com/state/north-dakota/
RESEARCHED from scratch (prior entry was blank). No statute, regulation, or case addressing either question was found for North Dakota specifically -- confirmed by a legal survey noting the state's own Department of Insurance says no applicable authority exists.