There's an installation where the feed is only suitable for a 150 amp panel to replace a Zinsco 100 amp panel, but the only panel that will fit is a 200 amp combination load center.
The neighboring property used a 200 amp panel but used a 150 amp main breaker instead of the 200 amp breaker. They used a Square D SC816D200C. It passed inspection.
Is it acceptable to downsize the main breaker like that? The buss is still 200 amps and someone could, in the future, put in a 200 amp main breaker thinking that it was okay because it's a 200 amp panel.