19.—(1) An applicant or appellant notified in accordance with regulation 18(21) must comply with regulation 21 within 6 weeks of the date of the notification given under regulation 18(21), or such longer period as may be agreed in writing with the authority or, as the case may be, the Welsh Ministers (“the relevant period”).
(2) If an applicant or appellant notified in accordance with regulation 18(21) does not comply with regulation 21 within the relevant period, the planning permission to which the EIA application relates ceases to authorise any minerals development from the end of that relevant period.