חתם סופר- הלכה למעשה

Harav Y.S. Elyashiv zt”l said:

 "The words of the Chasam Sofer are accepted as הלכה למעשה regardless if he wrote it in the Teshuvos or  in the Chidushim* on Shas".

*For other Poskim, if written in their Chidushim  on
Shas, it is not considered Halacha L'ma'aseh.