Competent authority designation and local limits rule govern acquisition of immovable property to counteract tax evasion. The provision empowers the Central Government to appoint competent authorities and define their local limits for acquisition of immovable property to counteract tax evasion; a property within a single local limit is dealt with by that authority, whereas properties within multiple limits are allocated according to Board rules. Rights in parts of buildings are deemed situated where the building is or will be constructed. Jurisdictional challenges are time-barred after a short statutory period following initiation of acquisition proceedings; timely challenges are decided by the competent authority or referred to the Board for written determination.