Chametz:<a href="//421E64E7-20D1-4F5E-AB63-665FD3FDD019#_ftn1" name="_ftnref1">[1]</a>
It is forbidden to own any Chametz when the Karban is slaughtered. Anyone who owns Chametz at the time that his Pesach was sacrificed is liable to receive lashes.
____________________________
<a href="//421E64E7-20D1-4F5E-AB63-665FD3FDD019#_ftnref1" name="_ftn1">[1]</a> Admur in Seder Karban Pesach; Rambam 1:5

Shulchan Aruch HaRav | Owning Chametz upon slaughtering the Karban Pesach

Chametz:[1] It is forbidden to own any Chametz when the Karban is slaughtered. Anyone who owns Chametz at the time that his Pesach was sacrificed is liable to receive lashes. ____________________________ [1] Admur in Seder Karban Pesach; Rambam 1:5