Assembly or installation.

(C) Assembly or installation. Final completion and acceptance is determined without regard to whether the taxpayer has an obligation to assist or supervise assembly or installation of the subject matter of the contract where the assembly or installation is not performed by the taxpayer or a related party. A taxpayer must account for the gross receipts and costs attributable to such an obligation using a permissible method of accounting, other than a long-term contract method.


26 CFR § 1.460-1

Scoping language

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