In N.P. v Minister of Justice and Constitutional Development and Others (2468/2024) [2026] ZAWCHC 343 (23 June 2026), the Western Cape High Court declared the common law rule of lex domicilii matrimonii unconstitutional and invalid, and developed the common law to replace it with a gender-neutral, multi-factor test. The judgment of Golden AJ closes a chapter that has stood since 1950 and carries immediate practical consequences for practitioners advising on the proprietary consequences of marriages with an international element.
The facts
The applicant, born in Colombia and educated in England, married the third respondent, a Zimbabwean-born businessman, while the couple were temporarily resident in Hong Kong. The parties disputed almost every fact bearing on domicile at the date of the marriage. The applicant maintained that both spouses were domiciled in England at the time, pointing to their British citizenship, their subsequent return to the United Kingdom, and their stated intention to settle there. The third respondent contended that he remained domiciled in Zimbabwe, the place he then regarded as home and to which he believed he would return, notwithstanding an open-ended secondment to Hong Kong and his later naturalisation as a British citizen.
The marriage broke down, and the applicant instituted divorce proceedings in the Western Cape High Court in April 2023. Under the lex domicilii matrimonii rule, the proprietary consequences of the marriage would be governed by the third respondent’s domicile at the time of the marriage. On the facts as the third respondent presented them, this pointed to Zimbabwean law; on the applicant’s version, it pointed to English law. Rather than ask the divorce court to resolve this factual dispute, the applicant brought a separate application, partly in her own interest and partly in the public interest under section 38(d) of the Constitution, to challenge the constitutional validity of the rule itself. The Minister of Justice and Constitutional Development abided the declaration of invalidity but opposed aspects of the proposed remedy and the costs order sought against her; the Minister of Home Affairs did not oppose; the third respondent confined his answering affidavit to the factual disputes concerning the marriage.
The constitutional challenge
The lex domicilii matrimonii rule, formally adopted in Frankel’s Estate & Another v The Master & Another 1950 (1) SA 220 (A) and confirmed in Sperling v Sperling 1975 (3) SA 707 (A), fixes the proprietary consequences of a marriage according to the husband’s domicile at the time the marriage is concluded, a domicile that cannot thereafter be changed for these purposes. The Domicile Act 3 of 1992 abolished the wife’s domicile of dependence but left the rule itself untouched, a survival recently reaffirmed, albeit reluctantly, in L.E v L.A (1884/2018) [2024] ZAGPJHC 104; 2025 (5) SA 539 (GJ).
Applying the section 9(1) rationality enquiry set out in Prinsloo v Van der Linde and Another [1997] ZACC 5; 1997 (3) SA 1012 (CC), and the substantive equality framework articulated in President of the Republic of South Africa and Another v Hugo 1997 (4) SA 1 (CC), Golden AJ held that the rule differentiates on the listed grounds of sex, gender and sexual orientation. It privileges the husband’s familiarity with the applicable legal system over the wife’s, rests on the outdated premise that a wife adopts her husband’s domicile, and makes no provision for same-sex marriages, since it cannot sensibly identify a “husband” whose domicile is to govern. Drawing on the Constitutional Court’s recent restatement in Jordaan and Others v Minister of Home Affairs and Another (CCT 296/24) 2025 (6) SA 323 (CC) that gender discrimination and patriarchal assumption remain deeply embedded in South African law, the court found no rational or legitimate governmental purpose capable of justifying the differentiation, and no basis on which the presumption of unfairness attaching to discrimination on a listed ground could be rebutted. The rule was accordingly declared inconsistent with section 9 of the Constitution and invalid.
A new common law rule
Having found the rule unconstitutional, the court turned to the question whether, and how, to develop the common law in terms of section 172(1)(b) of the Constitution, applying the five-stage enquiry set out in Mighty Solutions CC t/a Orlando Service Station v Engen Petroleum Ltd and Another 2016 (1) SA 621 (CC). Both the applicant and the Minister accepted that a bare declaration of invalidity was insufficient and that a replacement rule was required, differing only on its content.
Drawing on the 1978 Hague Convention on the Law Applicable to Matrimonial Property Regimes and Articles 22 and 26 of European Union Regulation 2016/1103, the court formulated a five-tier, gender-neutral test. The spouses may, before or at the time of the marriage, agree which legal system will govern the proprietary consequences of their marriage, provided there is a substantial link or connection between that choice and one or both spouses. Failing agreement, or failing such a link, the applicable law is that of the spouses’ common domicile at the time of the marriage; failing that, their common habitual residence at that time; failing that, their common nationality at that time; and, failing all of these, the law of the country to which the spouses were, at the time of the marriage, jointly and most closely connected. The court declined to adopt the SALRC’s Discussion Paper proposal that spouses be free to select any legal system whatsoever, reasoning that an unconstrained choice would be liable to abuse by the historically dominant spouse and would undermine the certainty the reform is intended to achieve.
Retrospectivity and costs
Consistent with the default position on retrospectivity established in Du Plessis and Others v De Klerk and Another 1996 (3) SA 850 (CC), the court held that the new rule applies retrospectively to existing marriages, subject to defined carve-outs protecting steps already taken under the old rule and estates already wound up on death or divorce. Where spouses have chosen a governing law in an antenuptial contract that is inconsistent with the new rule, that choice stands for two years to allow the contract to be amended. The court rejected the Minister’s alternative proposal, which would have deferred relief to existing opposite-sex marriages for two years while applying the new rule immediately to same-sex marriages, finding this differentiation irrational and itself a fresh form of discrimination. Invoking Gory v Kolver N.O. and Others [2006] ZACC 20; 2007 (4) SA 97 (CC), Gumede (born Shange) v President of the Republic of South Africa and Others [2008] ZACC; 2009 (3) SA 152 (CC) and Women’s Legal Centre Trust v President of the Republic of South Africa and Others [2022] ZACC 23; 2022 (5) SA 323 (CC), the court emphasised that effective relief requires the applicant, and similarly placed spouses, to obtain the immediate benefit of the reformed rule.
On costs, the court ordered both Ministers to pay the applicant’s costs jointly and severally on Scale C, notwithstanding that the Minister of Justice had abided the declaration of invalidity. Golden AJ regarded the thirty-year failure to replace a rule already flagged as discriminatory in the 1990 SALC Report on Domicile, and more recently in the SALRC’s own Discussion Paper, as decisive, and treated the Minister’s opposition to the applicant’s proposed remedy as substantive opposition warranting a costs order.
Practical implications
Practitioners advising clients on marriages concluded outside South Africa, or on divorces with a cross-border element, should reassess the applicable proprietary regime in light of the new five-tier test rather than defaulting to the husband’s historical domicile. Antenuptial contracts that designate a governing law inconsistent with the substantial-link requirement should be reviewed within the two-year window the order allows.
Questions and Answers
What is the lex domicilii matrimonii rule that the court was asked to strike down?
It is the common law choice-of-law rule under which the proprietary consequences of a marriage are governed by the law of the husband’s domicile at the time the marriage is concluded, a domicile that becomes fixed for these purposes and cannot be changed thereafter for the duration of the marriage.
When was the rule formally adopted and later confirmed by our courts?
It was adopted by the Appellate Division in Frankel’s Estate & Another v The Master & Another 1950 (1) SA 220 (A) and confirmed in Sperling v Sperling 1975 (3) SA 707 (A), and was recently applied, albeit reluctantly, in L.E v L.A (1884/2018) [2024] ZAGPJHC 104; 2025 (5) SA 539 (GJ).
Did the Domicile Act 3 of 1992 not already deal with this problem?
No. The Domicile Act abolished the wife’s domicile of dependence and gave her the right to acquire a domicile independent of her husband, but it left the lex domicilii matrimonii rule itself untouched, a gap the SALC’s own 1990 Project 60 Domicile Report had already identified.
On what constitutional grounds was the rule challenged?
The applicant relied on section 9(1) of the Constitution, arguing the rule bears no rational connection to a legitimate governmental purpose, and on section 9(3), arguing it unfairly discriminates on the grounds of sex, gender and sexual orientation.
How did the court approach the section 9(1) rationality enquiry?
Applying the standard set out in Prinsloo v Van der Linde and Another [1997] ZACC 5; 1997 (3) SA 1012 (CC), the court asked whether there was a rational relationship between the differentiation and a legitimate governmental purpose, and found none, given that the rule preserves a form of dependency the Domicile Act had already disavowed.
Why did the rule amount to unfair discrimination under section 9(3)?
Sex, gender and sexual orientation are listed grounds, so discrimination on those grounds is presumed unfair unless justified. The court, drawing on President of the Republic of South Africa and Another v Hugo 1997 (4) SA 1 (CC) and the recent restatement in Jordaan and Others v Minister of Home Affairs and Another (CCT 296/24) 2025 (6) SA 323 (CC), found no basis capable of rebutting that presumption.
How does the rule treat same-sex marriages?
It makes no provision for them at all, since it depends on identifying a “husband” whose domicile is to govern, a concept the court held cannot sensibly be applied to a same-sex union, which is itself a further, independent basis of unfair discrimination.
What legal test governs whether a court should develop the common law once it finds a rule unconstitutional?
The five-stage test in Mighty Solutions CC t/a Orlando Service Station v Engen Petroleum Ltd and Another 2016 (1) SA 621 (CC), which requires the court to establish the existing rule, its underlying rationale, whether it offends the Bill of Rights, how it should be amended, and the wider consequences of the change.
What international instruments informed the new choice-of-law rule?
The court had regard to the 1978 Hague Convention on the Law Applicable to Matrimonial Property Regimes and Articles 22 and 26 of European Union Regulation 2016/1103, neither of which binds South Africa, but both of which the court was entitled to consider under sections 39(1)(b) and 233 of the Constitution.
What does the new five-tier rule provide?
The spouses may agree, before or at the time of the marriage, which legal system is to apply, provided there is a substantial link between that choice and one or both spouses; failing agreement or such a link, the applicable law follows their common domicile, then their common habitual residence, then their common nationality, and finally the country to which they are jointly most closely connected, each factor assessed as at the date of the marriage.
Why did the court reject the SALRC’s proposal to allow spouses an unrestricted choice of governing law?
Because an unrestricted choice would be open to abuse by the spouse in the stronger bargaining position, historically the husband, and would undermine the certainty and accessibility the reform is meant to achieve; the court therefore required a substantial link between the chosen law and the marriage.
What is the default position on retrospectivity where a common law rule is declared unconstitutional?
The default, as confirmed in Du Plessis and Others v De Klerk and Another 1996 (3) SA 850 (CC), is that the change operates retrospectively, and any departure from that position must be justified as just and equitable under section 172(1)(b) of the Constitution.
Why did the court reject the Minister’s proposal to defer the new rule for existing opposite-sex marriages for two years while applying it immediately to same-sex marriages?
The court found this differentiation irrational and self-defeating, since it would perpetuate the very discrimination the order was meant to remedy for opposite-sex spouses while creating a new, unjustified distinction between opposite-sex and same-sex marriages.
What limits were placed on the retrospective effect of the new rule?
The development does not disturb steps, decisions or transactions already taken under the old rule, does not reopen marriages already dissolved by death or divorce, and allows spouses who chose a governing law in an antenuptial contract two years to amend that contract to align with the new rule.
On what basis were the Ministers ordered to pay costs despite abiding the declaration of invalidity?
The court held that the Minister of Justice had, in substance, opposed the applicant’s proposed remedy, and that the State’s failure over three decades to replace a rule it had itself acknowledged as discriminatory, in the SALC’s 1990 Domicile Report and again in the SALRC’s own Discussion Paper, justified a costs order on the authority of Jordaan and Magnificent Mile Trading 30 (Pty) Limited v Charmaine Celliers N.O. and Others [2019] ZACC 36; 2020 (4) SA 375 (CC).
Written by Bertus Preller, a Family Law and Divorce Law attorney and Mediator at Maurice Phillips Wisenberg in Cape Town and founder of iDivorce and iANC. A blog, managed by SplashLaw, for more information on Family Law read more here. For free and useful Family Law tech applications visit Maintenance Calculator and Accrual Calculator.
DOWNLOAD THE JUDGEMENT HERE: