4. The controller of a holding shall not knowingly or otherwise cause directly or indirectly the entry of nitrogen fertiliser into any waterway or water contained in any underground strata.
5. In complying with any duty under these Regulations, the owner and/or controller of a holding shall have regard to any guidance which may be issued from time to time by the Department or Departments for the purposes of these Regulations and, in accordance with Article 4 of the Directive, the Code of Good Agricultural Practice as may be amended from time to time.