48. The following, except one, are the exceptional circumstances warranting the disregard of the doctrine of separate personality:

A.When directors and trustees or, in appropriate case, the officers of a corporation vote for or assent to patently unlawful acts of the corporation.

B.When a director or officer has consented to the issuance of watered down stocks or who, having knowledge thereof, did not forthwith file with the corporate secretary his written objection thereto.

C.When a director, trustee or officer has contractually agreed or stipulated to hold himself personally and solidarily liable with the corporation.

D.When a director, trustee or officer is made, by specific provision of by-laws, personally liable for his corporate action.