Ligeantia acquisita, not by nature but by acquisition or denization, being called a denizen, or rather denizon, because they are subditus datus; (c) Ligeantia localis, by operation of law, when a friendly alien enters the country, because so long as they are in the country they are within the sovereign's protection, therefore they owe the sovereign a local obedience or allegiance (R v Cowle (1759) 2 Burr 834; Low v Routledge (1865) 1 Ch App 42; Re Johnson, Roberts v Attorney-General [1903] 1 Ch 821; Tingley v Muller [1917] 2 Ch 144; Rodriguez v Speyer [1919] AC 59; Johnstone v Pedlar [1921] 2 AC 262; R v Tucker (1694) Show Parl Cas 186; R v Keyn (1876) 2 Ex D 63; Re Stepney Election Petn, Isaacson v Durant (1886) 17 QBD 54); (d) A legal obedience, where a particular law requires the taking of an oath of allegiance by subject or alien alike. Natural allegiance was acquired by birth within the sovereign's dominions (except for the issue of diplomats or of invading forces or of an alien in an enemy occupied territory). The natural allegiance and obedience are an incident inseparable from every subject, for as soon as they are born they owe by birthright allegiance and obedience to the Sovereign (Ex p. Anderson (1861) 3 E & E 487). A natural-born subject owes allegiance wherever they may be, so that where territory is occupied in the course of hostilities by an enemy's force, even if the annexation of the occupied country is proclaimed by the enemy, there can be no change of allegiance during the progress of hostilities on the part of a citizen of the occupied country (R v Vermaak (1900) 21 NLR 204 (South Africa)). Acquired allegiance was acquired by naturalisation or denization. Denization, or ligeantia acquisita, appears to be threefold (Thomas v Sorrel (1673) 3 Keb 143); (a) absolute, as the common denization, without any limitation or restraint; (b) limited, as when the sovereign grants letters of denization to an alien, and the alien's male heirs, or to an alien for the term of their life; (c) It may be granted upon condition, cujus est dare, ejus est disponere, and this denization of an alien may come about three ways: by parliament; by letters patent, which was the usual manner; and by conquest. Local allegiance was due by an alien while in the protection of the