In February 1995, the parties were divorced and a consent paper was made an order of the Cape of Good Hope Provincial Division of the High Court. The consent paper required the appellant (plaintiff) to pay maintenance to the respondent (defendant), subject to a dum casta condition: the obligation would endure until her death, remarriage, or until she lived with another man as husband and wife for more than six months in any calendar year or nine months in any three-year period. The maintenance included a monthly amount of R3 000 (subject to CPI adjustment), medical expenses, car servicing and replacement, and levies on her townhouse. In 1997, the appellant approached the maintenance court to discharge his obligation; the magistrate instead reduced the monthly amount to R1 500. In May 1998, the appellant applied for maintenance for the children, while the respondent counter-applied for an increase in her own maintenance. In December 1998, Magistrate Venter varied the order by substituting a new order for R3 500 per month, operative retrospectively from 1 December 1998, and expressly stated that clauses 4(a)(ii) to (iv) of the consent paper remained in force, but made no mention of the dum casta condition in the introductory part of clause 4(a). In January 2000, the appellant sued the respondent in the High Court, alleging she had breached the dum casta condition and seeking a declaratory order that he was no longer liable to pay maintenance, plus repayment. The respondent defended the claim on the basis that the dum casta clause had ceased to exist when the maintenance court made its substitution order in December 1998. The court a quo accepted this defence, and the appellant appealed to the Supreme Court of Appeal with leave.