XL. enunciata, et controversa iuris responsa

Ulpian rightly answered that Law is named from justice.

II.
There is only one natural law, and only one Law of Nations, having exploded the distinction of the Doctors between primordial and secondary Law.

III.
Custom abrogates and amends written Law.

IV.
The Prince is exempt from the Laws.

V.
Common error does not make Law.

VI.
Azo rightly defends against Lothair that the Prince alone does not hold pure authority, but other Magistrates do as well.

VII.
We firmly maintain, against the common opinion of the Doctors, that mixed authority can be delegated, and jurisdiction transferred by mandate.

VIII.
The appointment of a tutor is neither an act of authority nor of jurisdiction.

IX.
Faith given to an enemy must be kept.

X.
A judge ought to judge according to those things which are acted and alleged in the Judgment, not according to those things which he knows as a private individual.

XI.
In private affairs, a son may have his father, and a father his son, as a judge.