Also known as: functionally equivalent · functional equivalence · functional equivalent doctrine
Written by attorneys · grounded in primary & secondary sources — see below
A thing that produces the same practical legal consequences or operates in the same manner as a different thing even if not identical in form or procedure. The label turns on whether the substitute achieves the identical legal result or triggers the identical doctrinal rule as the original.
Floyd Franklin was stopped on the street and driven to the station for questioning without being told he was under arrest. Officers lacked probable cause but claimed the stop was merely an investigative detention. Because the transport and station-house questioning operated as the functional equivalent of an arrest, the seizure required probable cause and the statements were suppressed.
Farah Fox owned Grand Central Terminal and sought to build above it. The city landmarks law barred any construction that would alter the terminal's exterior. The prohibition functioned as the functional equivalent of an appropriation of the air rights, requiring just compensation under the Takings Clause.
Select any source to read its text and confirm it supports the definition.
Felicia Fuentes gave a recorded statement to police describing an assault. The statement was never subjected to cross-examination. Because the affidavit was the functional equivalent of in-court testimony, its admission at trial violated the Confrontation Clause.
Frank Fisher sued the sitting President for private conduct. The district court postponed trial until after the term ended. The postponement operated as the functional equivalent of temporary immunity and was reversed on appeal.
Falcon Dynamics challenged a city rent-control ordinance that sharply limited returns on its property. The ordinance was analyzed as the functional equivalent of a physical appropriation, triggering the same takings test applied to direct seizures.
Freya Freeman held copyrights scheduled to expire. A statute extended the terms by twenty years. The extension functioned as the functional equivalent of a new grant of property rights and was upheld against a constitutional challenge.
Police words or actions that the officer should know are reasonably likely to elicit an incriminating response count as the functional equivalent of express questioning. The safeguards therefore apply even without literal questions once custody exists.
Supporting sources
Once the buyer has taken possession, made substantial payments, and built equity, courts treat the contract as the functional equivalent of a purchase-money mortgage. The seller must then use foreclosure-type procedures rather than strict forfeiture.
No. The same label appears in takings doctrine, environmental permitting, evidence, and property security devices whenever one arrangement produces the identical legal result as another.
Courts weigh time, distance, proportion of pollutant reaching navigable water, and degree of dilution or chemical change. When these factors show the discharge functions like a direct pipe into protected waters, an NPDES permit is required.
…statement. Various formulations of this core class of "testimonial" statements exist: " ex parte in-court testimony or its functional equivalent — that is, material such as affidavits, custodial examinations, prior testimony that the defendant was unable to cross-examine, or similar pretrial statements that declarants would…