Chief justice Mogoeng Mogoeng has questioned the "extraordinary" personal costs order granted against public protector Busisiwe Mkhwebane in her battle with the SA Revenue Service (Sars) over former president Jacob Zuma’s tax records and the reasons given for it.

Mkhwebane has turned to the Constitutional Court in an effort to challenge the scathing ruling against her by Pretoria high court judge Peter Mabuse, who found that her office did not have the power to subpoena Zuma’s tax records.

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