39. Where an exporter has submitted an application for approval under regulation 61(1) which was accompanied by the fee specified in regulation 65(1)(a) and he subsequently issues evidence notes for in excess of 400 tonnes of WEEE in the approval period to which the application relates, the exporter must pay the fee specified in regulation 65(1)(b) in the period to which the approval relates, less the amount of the fee already paid which is specified in regulation 65(1)(a).