Sub-panel conductor sizing

[Mike410is]

I have a 200amp exterior panel with feed-through lugs that feeds a 150amp sub-panel inside the house. Do I need to size my feeder conductors to the 200amp even though my sub-panel has a 150amp main breaker?

 

[LarryFine]

Yes, unless you can use one of the tap rules.

 

[Mike410is]

Yes, unless you can use one of the tap rules.

Thanks