Theses de testamentis

XXVI.
And although a prior will is broken by a completed later will: if, however, that first one is fortified by a derogatory clause, the second does not derogate from it, unless by special revocation.

XXVII.
Furthermore, wills are invalidated not only by the ways already mentioned, but also by the passage of time: for instance, if the testator, ten years having elapsed from the time of making the will, with at least three witnesses employed, or in the records, simply says that he does not wish the will made by him to be valid. Then it is immediately held for naught, as much from contrary will as from the passage of time.

I.
Wills are of the law of nations.

II.
Sale, donation, or other contracts cannot be made in wills.

III.
In the wills of spouses, the survivor can correct his or her own will.

IV.
A will made according to the custom of the place is valid everywhere.

V.
A vassal cannot dispose of a fief in a will, unless he institutes his nearest agnate.