20Varying and withdrawing directions
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(1)A power to give directions conferred by an Assembly Act or a Welsh subordinate instrument may be exercised to vary or withdraw any directions given under the power.
(2)A duty to give directions imposed by an Assembly Act or a Welsh subordinate instrument includes a power (exercisable in the same way and subject to the same conditions or limitations as the duty) to vary, or withdraw and replace, any directions given under the duty.