Consequential assessment notice powers allow reassessment to give effect to prior findings, directions, or panel instructions within prescribed time limits. Notice under section 280 may be issued at any time, notwithstanding section 282, for an assessment, reassessment or recomputation made to give effect to a finding or direction in an order of an authority, Tribunal or Court, or to directions of the Approving Panel. The provision does not apply where the relevant tax year was already time-barred at the material time. The notice must be issued within three months from the end of the quarter in which the certified copy of the order is received.