“A person is said to be valens agere when, from age and position, he is able to protect his rights against the invasion of them by others: against such a person not protecting his rights prescription runs, while prescription does not run against one who is non valens agere.” John Trayner, Trayner’s Latin Maxims 621 (4th ed. 1894).
valens agere
valens agere (vay-lenz aj-[schwa]r-ee). [Law Latin] Hist. Able to act.
