What happens to the transfer of immovable property made by the guardian in contravention of Sections 28…

Under Section 30 of the Guardians and Wards Act, 1890, a disposal of immovable property by a guardian in contravention of Section 28 or Section 29 is "Voidable at the instance of any other person affected thereby". It is not void from the start: it stands until the affected person, usually the ward, chooses to set it aside.