The binding legal principle is that the word "spouse" in the Intestate Succession Act 81 of 1987 and the word "survivor" in the Maintenance of Surviving Spouses Act 27 of 1990, when undefined and interpreted in accordance with section 39(2) of the Constitution (to promote the spirit, purport and objects of the Bill of Rights), must be construed to include parties to a monogamous Muslim marriage. This interpretation: (1) accords with the ordinary meaning of the word "spouse" as a married person, husband or wife; (2) is consistent with constitutional values of equality, dignity, tolerance and respect for religious and cultural diversity; (3) furthers the purpose of the Acts, which is to protect vulnerable surviving spouses, particularly widows; (4) avoids unfair discrimination on grounds of religion, culture and marital status; (5) gives effect to the constitutional guarantee of freedom of religion and the constitutional authorization of legislation recognizing marriages concluded under religious law (section 15(3)); (6) corrects past discriminatory interpretations rooted in racial, cultural and religious prejudice that are incompatible with the Constitution. The precedents in National Coalition for Gay and Lesbian Equality (2) and Satchwell, which held that "spouse" refers to parties to marriages recognized as valid in law, are distinguishable because those cases concerned same-sex life partnerships where parties were not married and could not ordinarily be considered spouses, whereas parties to Muslim marriages are married persons (husband and wife) who fall within the ordinary meaning of "spouse". This interpretation is limited to the specific statutory context and does not imply general recognition of all consequences of Muslim marriages for other purposes or address polygamous Muslim marriages.