Former prime minister Najib Abdul Razak's daughter Nooryana Najwa has mounted a legal challenge against the constitutionality of a provision under the Income Tax Act 1967.

This comes as Section 106(3) of the Act disallows court intervention in a civil suit filed by the Inland Revenue Board (IRB) against Nooryana, where the government is claiming over RM10.3 million in income tax from Nooryana...