42. The party or parties pleading to a declaration propounding a will or testamentary script shall be allowed to plead only the pleas hereunder set forth, unless by leave of the Court, to be obtained on summons:-
1. That the paper writing bearing date, etc., and alleged by the plaintiff (or defendant) to be the last will and testament (or codicil to the last will and testament) of A.B., late of, etc., deceased, was not duly executed according to the provisions of the Wills and Succession Law in manner and form as alleged.
2. That A.B., the deceased in this cause, at the time his alleged will (or codicil) bears date, to wit, on the, etc., was not of sound mind, memory, and. understanding.
3. That the execution of the said alleged will (or codicil) was obtained by the undue influence of C.D., and others acting with him.
4. That the execution of the said alleged will (or codicil) was obtained by the fraud of C.D. and others acting with him.
5. That the deceased at the time of the execution of the said alleged will, (or codicil) did not know and approve of the contents thereof.
Any party pleading the last of the above pleas shall therewith (unless otherwise ordered by the Court) deliver to the adverse parties and file in the registry particulars in writing, stating shortly the substance-of the case he intends to set up thereunder; and no defence shall be available thereunder which might have been raised under any other of the said pleas, unless such other plea be pleaded therewith.