Chapter 112, which Chametz is prohibited to keep and which is permitted - סִימָן קיב - אֵיזֶה חָמֵץ אָסוּר לְהַשְׁהוֹת בְּפֶסַח וְאֵיזֶה מֻתָּר לְהַשְׁהוֹתוֹ

From Kitzur Shulchan Aruch - Rabbi Chaim Wolosow by R Chaim Wolosow.

https://www.torahrecordings.com/kituzr-shulchan-aruch/112