Concurrent jurisdiction and delegation allow redistribution and transfer of wealth-tax functions under written orders. The amendment expands the Wealth-tax Act's scope by treating certain statutory corporations as companies and restructures administrative control: it creates concurrent jurisdiction where multiple Income-tax Officers have authority, authorises the Commissioner and the Board to specify distribution and allocation of wealth-tax functions by written general or special orders, permits transfer of cases among subordinate officers (without requiring reissue of notices), and enables delegation of specified functions to Inspectors or ministerial staff, with a new provision clarifying which Wealth-tax Officer is competent to perform particular functions.