Penalty provisions revised: new percentage penalties, aggregate cap and expanded deeming rules for concealment and proceedings. Amendments to section 271 revise penalty rules: include failure to comply with a direction under section 142(2A); recast clause (i) to set percentage-based penalties for representative assessees and monthly percentage levies in other cases; amend clause (iii) to set penalties between no less than and no more than twice the tax sought to be evaded with prior approval required where assessed income exceeds a threshold; add explanatory provisions treating false or unsubstantiated explanations and certain utilisation of earlier additions as concealment; permit penalty proceedings under that Explanation despite completion of other proceedings; add an aggregate cap and omit subsections (4A) and (4B).