Section 18(4)(d) of the Child Care Act 74 of 1983, which requires only the mother's consent (and not the father's consent) for adoption of a child born outside marriage, constitutes unfair discrimination in violation of section 8 of the Constitution. The provision discriminates impermissibly: (1) between fathers of children born from different types of unions (as section 27 treats Black customary unions as marriages but not other religious unions); and (2) potentially on grounds of gender and marital status, creating unjustifiable anomalies that cannot be defended merely by biological differences between mothers and fathers or by the marital status of parents. Such discrimination is not reasonable or justifiable in an open and democratic society based on freedom and equality. Legislative responses to adoption must be nuanced, considering factors such as the relationship between parents, the father's involvement with and support of the child, the age of the child, and the best interests of the child, rather than relying on blanket rules based solely on marital status.