All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.
Using these items depends on the bylaw which governs their use; therefore if this bylaw grants a given executive the right to permit or restrict the use of these items, and then such executive gives permission to your husband to take some cardboard boxes, then it is permissible for your husband to use them.
For more benefit, please refer to Fatwa 91148.
Allaah Knows best.