17.—(1) Subject to paragraphs (2) and (3) and regulations 18 to 24, the capacity of storage facilities for livestock manure and silage effluent of a holding shall be sufficient and adequate to provide for the storage of all the livestock manure and silage effluent which is likely to require storage on the holding for such period as may be necessary to ensure compliance with these Regulations and the avoidance of water pollution.
(2) For the purposes of paragraph (1), the controller shall have due regard to the storage capacity likely to be needed by the holding during periods of adverse weather conditions when, due to extended period of wet weather, frozen ground or otherwise, the application to land of organic manure is not permitted.
(3) Subject to regulation 18, the total livestock manure storage capacity on holdings shall be sufficient for at least 22 weeks storage.
(4) All storage facilities for livestock manure and silage effluent shall be maintained free of structural defect, shall be of such standard as is necessary and be managed to prevent run-off or seepage, directly or indirectly, into a waterway or water contained in any underground strata and where applicable shall comply with regulations 19 and 24.