definiens: means the sum of all refunds of Tax received bythe Group Companies from a Tax Authority within two ( 2 ) years of the Completion Date in respect of a period ( inrespect of which Tax is assessed or charged on that Group Company ) or part of a period ending on or beforeCompletion which were not shown as assets in, reflected in or taken into account in, or in computing a provision forTax in, the Net Working Capital Amount including, for the avoidance of doubt, any interest or repayment supplements(less any Tax due, or which would have been due, but for the availability of any Purchaser ’s Relief ) . For the avoidanceof doubt, this paragraph 9 shall not apply to any refund of Tax received in respect of any amount on account of Taxrequired by Law to be deducted or withheld from any payments made under this Agreement . The Purchaser shall useall reasonable endeavours to procure that the Group Companies obtain, on a timely basis, all refunds of Tax to whichthis paragraph 9 could apply