[Where any refund of unutilised input tax credit on account of export of goods or of integrated tax paid on export of goods has been paid to an applicant but the sale proceeds in respect of such export goods have not been realised, in full or in part, in India within the period allowed under the Foreign Exchange Management Act, 1999 (42 of 1999), including any extension of such period, the person to whom the refund has been made shall deposit the amount so refunded, to the extent of non-realisation of sale proceeds, along with applicable interest within thirty days of the expiry of the said period or, as the case may be, the extended period, failing which the amount refunded shall be recovered in accordance with the provisions of section 73 or 74 of the Act, as the case may be, as is applicable for recovery of erroneous refund, along with interest under section 50: 

Provided that where sale proceeds, or any part thereof, in respect of such export goods are not realised by the applicant within the period allowed under the Foreign Exchange Management Act, 1999 (42 of 1999), but the Reserve Bank of India writes off the requirement of realisation of sale proceeds on merits, the refund paid to the applicant shall not be recovered.] ¹