Substitution of constitution: companies may adopt a memorandum and articles by special resolution, replacing prior constituting instruments. A company may, by special resolution, substitute a memorandum and articles for a deed of settlement, with or without altering its objects. The alteration is subject to the procedural rules applicable to changes of objects, modified so that a printed copy of the substituted memorandum and articles is filed; on registration certified by the Registrar the new memorandum and articles govern the company and the deed of settlement ceases to apply. 'Deed of settlement' is defined to include various constituting instruments such as deeds of partnership, Royal Charters, Letters Patent, and similar instruments.