Realisation period for export proceeds is fixed but may be extended by the Reserve Bank for sufficient cause. The full export value of goods or software must be realised and repatriated to India within nine months from the date of export, with exports to authorised overseas warehouses payable to an authorised dealer as soon as realised and in any case within fifteen months; the Reserve Bank or authorised dealer may extend these periods for sufficient cause. For software not in physical form, the invoice date is the date of export. Status Holder exporters have a twelve month realisation period subject to Reserve Bank extension and potential direction to revert to the standard period after opportunity to be heard.