Refunds may be authorized

(a) in respect of revenue correctly collected in accordance with law, and subsequently reclaimed under conditions prescribed by law, by the authority prescribed in the appropriate enactment;

(b) in respect of revenue which result from erroneous collection, where the erroneous collection took place in

(i) the current year, the head of department may authorise a payment from the Consolidated Fund in accordance with the Financial Administration Act, 2003 (Act 654) chargeable to the revenue item concerned; and

(ii) a previous year, details of the necessary refund shall be supplied to the Controller and Accountant-General who may authorize a refund chargeable to an account so designated in the Departmental Accounting Instructions.