The evidence standard is whether the local sign still performs at the point of choice. Drivers should be able to recognize the station from the road, the map, the price board, the canopy, the loyalty path, and the receipt.
Ask for market-side evidence before replacing the mark. Does the parent mark lower friction, or does it ask customers to relearn a route they already understood?
That makes Aral a governance case as much as a design case. The parent has to decide when to standardize, when to endorse quietly, and when to let a local retail asset keep doing the public job at road speed, on maps, at pumps, in shop visits, in fleet routines, in price comparison, and in everyday route memory.
The practical check is field evidence, not identity preference: road recognition, station visits, loyalty behavior, customer language, and local search should all be reviewed before a parent mark replaces a working local cue.