51. Regulation 24(1) and (10) apply to statements provided in accordance with this Part with the following modifications—
(a)where the Welsh Ministers or an inspector notify the appellant under regulation 24(1), the appellant must provide the further information within such period as the Welsh Ministers or the inspector may specify in the notice or such longer period as the Welsh Ministers or the inspector may allow;
(b)if an appellant to whom a notice has been given under paragraph (a) fails to provide the further information within the period specified or allowed, the the ground (a) appeal lapses at the end of that period.