ISASA (Independent Schools Association of Southern Africa), which owns public benefit organisation (PBO) properties throughout South Africa, challenged municipalities' levying of rates on PBO property. In 2007, the Minister for CoGTA published draft regulations proposing rate ratios for various categories of non-residential property, including PBO property at 25% of residential property rates. eThekwini and Stellenbosch participated in consultations through SALGA but did not object. When the 2009 regulations were promulgated, PBO property was omitted. ISASA challenged this omission in the Gauteng High Court. In March 2010, a settlement order was made requiring the Ministers to publish amended regulations including PBO property at a 1:0.25 ratio. The 2010 amended regulations were published on 12 March 2010, effective 1 July 2010. eThekwini refused to comply, arguing PBO property was not a defined category in its rates policies. ISASA brought an application in the KwaZulu-Natal High Court seeking to compel eThekwini to levy rates not exceeding 25% on PBO property. eThekwini counter-applied to review the amended regulations and challenge the constitutionality of s 19(1)(b) of the MPRA. Stellenbosch later joined the proceedings.