Case Facts
Southern Rhodesia was annexed by the Crown and given the status of a colony by virtue of an Order in Council that came into operation on 12 September 1923. Under the Constitution of Southern Rhodesia 1961 (S.I. 1961, No. 2314), Southern Rhodesia enjoyed a significant degree of self-government, with its own legislature and Legislative Assembly. The 1961 Constitution provided that the law to be administered was the law in force in the Cape of Good Hope in June 1891, thereby incorporating a Roman-Dutch legal foundation. It also contained a Declaration of Rights, including s 58(1), which provided that no person shall be deprived of personal liberty save as may be authorised by law, subject to derogation during a period of public emergency under s 69(1).
On 5 November 1965, a state of emergency was validly proclaimed by the Governor of Southern Rhodesia. On 6 November 1965, the first respondent, Lardner-Burke, acting as Minister of Justice, lawfully made a detention order against Daniel Madzimbamuto, the appellant's husband, on the ground that he was likely to commit acts endangering public safety, disturbing public order, or interfering with essential services. These initial steps were therefore taken within the framework of the lawful constitutional order.
On 11 November 1965, the Prime Minister of Southern Rhodesia and his colleagues issued a Unilateral Declaration of Independence (UDI), purporting to declare Southern Rhodesia an independent sovereign state no longer forming part of Her Majesty's dominions. On the same day, the Governor issued a public statement declaring the UDI unconstitutional, announcing that the Prime Minister and his colleagues had ceased to hold office, and issuing a directive requiring the judiciary, armed services, police, and public service to maintain law and order and to carry on with their normal tasks.
On 16 November 1965, the United Kingdom Parliament enacted the Southern Rhodesia Act 1965, declaring that Southern Rhodesia continued to be part of Her Majesty's dominions and that the Government and Parliament of the United Kingdom retained responsibility and jurisdiction in respect of it, and empowering Her Majesty to make provision by Order in Council. On 18 November 1965, the Southern Rhodesia (Constitution) Order 1965 (S.I. 1965, No. 1952) was made. By s 2(1) of that Order, any instrument made in purported promulgation of a constitution for Southern Rhodesia, except as authorised by Act of Parliament, was declared void and of no effect. By s 3(1), the powers of the legislature and Legislative Assembly were suspended. By s 6, any law made, business transacted, or step taken in contravention of the Order was likewise declared void.
The lawful state of emergency, validly proclaimed on 5 November 1965, expired on 4 February 1966. After that date, Daniel Madzimbamuto's detention was continued under fresh emergency regulations purportedly made by the illegal régime following UDI. At first instance, Lewis and Goldin JJ in the General Division of the High Court of Southern Rhodesia held that the 1965 Constitution and the government installed by the UDI were unlawful, but reasoned that necessity required the courts to give effect to the fresh emergency regulations because the illegal régime was the only effective government in practice. Accordingly, they upheld the detention as lawful.
On appeal, the Appellate Division of the High Court of Southern Rhodesia affirmed the first-instance decision in the main but held that the particular regulation under which Daniel Madzimbamuto had been detained since 4 February 1966 was ultra vires and invalid, allowing the appeal on that specific point. A fresh detention order was immediately made under a different regulation which the Appellate Division had by implication treated as valid. The appellant appealed to Her Majesty in Council under s 71(5) of the 1961 Constitution, which conferred on any person aggrieved by a determination of the High Court under that section the right to appeal to Her Majesty in Council, notwithstanding the Appellate Division's refusal of leave to appeal.
Held
The Privy Council allowed the appeal. As a preliminary matter, the Board held that it had jurisdiction to hear the appeal under s 71(5) of the 1961 Constitution, since the appellant was an "aggrieved" person within the meaning of that provision, and the right of appeal to Her Majesty in Council was not dependent upon leave being granted by the Appellate Division.
On the substantive issues, the Board held that the doctrine of necessity did not apply so as to require courts of the lawful sovereign to give effect to the emergency regulations of the illegal régime. The fresh detention orders made under regulations promulgated by the illegal régime after UDI were void and of no legal effect, by reason of the Southern Rhodesia Act 1965 and the Southern Rhodesia (Constitution) Order 1965. The detention of Daniel Madzimbamuto continued under those void regulations was therefore unlawful.
The Board further held that the United Kingdom Parliament retained full sovereignty over Southern Rhodesia notwithstanding the UDI. The convention that the UK Parliament would not legislate on matters within the competence of the Legislative Assembly of Southern Rhodesia did not diminish or curtail Parliament's legal power to legislate for that territory. The Southern Rhodesia Act 1965 was a valid exercise of that sovereign legislative power.
The Board also held that the conceptions of de facto and de jure status applicable in international law as between sovereign states had no application in the courts of the lawful sovereign in relation to a territory, such as Southern Rhodesia, which remained part of Her Majesty's dominions even though it was under the effective control of a usurping government. Arguments based on Roman-Dutch law conceptions of sovereignty were similarly rejected.
Ratio Decidendi
The central ratio of the case rests on two related propositions.
First, parliamentary sovereignty is absolute and unlimited in scope. The UK Parliament retained full legal sovereignty over Southern Rhodesia notwithstanding UDI. A constitutional convention — that Parliament would not legislate on matters within the competence of Southern Rhodesia's own legislature — cannot restrict Parliament's legal power to legislate. As the Board made clear, it is a fundamental principle of English constitutional law that Parliament may legislate for any territory subject to its sovereignty, and no convention, however well established in practice, can deprive Parliament of that legal capacity. This affirmation of parliamentary sovereignty is significant for the broader study of public law, confirming that conventions operate on the political plane only and carry no legal force capable of constraining Parliament.
Second, the doctrine of necessity did not require — and could not require — courts of the lawful sovereign to give legal effect to regulations and acts of an illegal usurping régime. The fact that the illegal régime was the only effective governmental authority on the ground in Southern Rhodesia did not, in the eyes of the Privy Council, oblige courts bound by the lawful sovereign's legal order to treat the régime's measures as valid. The Southern Rhodesia Act 1965 and the Southern Rhodesia (Constitution) Order 1965 together rendered void any laws made or steps taken in contravention of the lawful constitutional framework, and no plea of necessity could overcome that express statutory voiding. The courts of the lawful sovereign were not obliged to defer to measures that the lawful sovereign had expressly declared to have no legal effect.
The Board also affirmed that international law concepts of de facto and de jure governmental authority, which might be applied as between independent sovereign states, have no place in the domestic courts of the sovereign when determining the validity of acts of an entity that remains, in law, a dependent territory. This principle confirms that the legal framework governing colonial and dependent territories is distinct from the framework applicable to fully independent states.
Obiter Dicta
In the course of its judgement, the Board made observations regarding the position of individuals subject to the effective control of a usurping government. The Board discussed the Statute of Treason 1495 (11 Hen. VII, c.1) in the context of the limited doctrine of temporary allegiance, by which a person living under the obedience of a government in effective control of a territory might, in extreme circumstances, owe that government a temporary allegiance and be protected in acting in accordance with its commands. The Board acknowledged that this doctrine had some historical foundation but held expressly that it was inapplicable in the present circumstances. The observations on this point were therefore not determinative of the outcome and did not extend to any general recognition that the measures of a long-running illegal régime might acquire legal validity simply through the passage of time or the effectiveness of control.
The Board also declined to apply to the domestic legal context the international law distinction between de facto and de jure governments, noting that such concepts were developed for a different purpose — that is, to regulate relations between fully independent sovereign states — and could not be imported wholesale into the legal analysis of a territory that remained part of Her Majesty's dominions. These observations serve as a caution against conflating international law doctrines with domestic constitutional law principles when assessing the legality of governmental acts in the context of parliamentary sovereignty.