 Nec vi, nec clam, nec precario

Nec vi, nec clam, nec precario, is a Latin legal term meaning 'without force, without secrecy, without permission' or, in an alternative formulation offered, for instance, by Lord Hoffmann, 'not by force, nor stealth, nor the licence of the owner'.It is the principle by which rights may be built up over time, principally public rights of way in the United Kingdom.