Cutler Hammer BWH 25K Double Taps?

Hello, I am confused regarding double taps at the main breaker. The main breaker is a BWH 25K 150 amp breaker from Cutler Hammer and the homeowner says it allow double taps? The wire size says 2 - 300 and allows 2 poles. Please help. Thanks!!!

Not at the service main.

Home owner is incorrect.

One conductor only.

Did I not say that?
Just listen to the HO if you want to get accurate info…NOT!
Most, if not all know jack sh*t !
Agree with them and do your report accordingly.