The Western Cape High Court is expected to hand down judgment in the first of a two-part application by the Public Protector on Friday.
Busisiwe Mkhwebane is seeking to interdict Parliament from investigating her over her fitness to hold office.
She says the rules governing the process are unconstitutional and that there is a vendetta against her.
But Parliament says it has a constitutional mandate to exercise accountability over Chapter 9 institutions.
Speaker of the National Assembly Thandi Modise said the parliamentary process would continue in the absence of judgment directing it otherwise.
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