Botswana

(1) Subject to the provisions of subsections (4), (5) and (7) of this section, no law shall make any provision that is discriminatory either of itself or in its effect.
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(3) In this section, the expression “discriminatory” means affording different treatment to different persons, attributable wholly or mainly to their respective descriptions by race, tribe, place of origin, political opinions, colour, creed or sex whereby persons of one such description are subjected to disabilities or restrictions to which persons of another such description are not made subject or are accorded privileges or advantages which are not accorded to persons of another such description.
(4) Subsection (1) of this section shall not apply to any law so far as that law makes provision-
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(c) with respect to adoption, marriage, divorce, burial, devolution of property on death or other matters of personal law;
… (Sec. 15)