ex fictiòne jùris - by virtue of a legal fiction.

ex lège - according to the law.

ex majòre cautela - for greater caution.

ex necessitate - if necessary.

ex officio - by virtue of the position held.

exprèssio fàlsi - nonsense.

ex pròprio vigòre - automatically, on your own.

constat - obviously, indisputably.

consentire vidètur qui tàcet - silence is a sign of consent.

consènsus fàcit jus - "agreement creates law", that is, the parties create a right for themselves through an agreement.