19. Any document required or authorised to be sent by one person to another under the provisions of these Regulations may, be sent by post or by means of electronic communication and any reference in these Regulations, however expressed, to writing, is to be construed as including a reference to a form capable of being stored on, transmitted to and from, and read by means of a computer.
20. Where these Regulations require any person to give notice to a relevant authority which includes a description of any land, and that relevant authority has previously allotted to that area of land a reference number for that purpose, the identification of that land by reference to that number is to be regarded as sufficient to comply with that requirement.