16. Articles of association
(1) A company must have articles of association prescribing regulations for the company.
(2) Unless it is a company to which model articles apply by virtue of section 18 (default application of model articles), it must register articles of association.
(3) Articles of association registered by a company must—
(a) be contained in a single document, and
(b) be divided into paragraphs numbered consecutively.
(4) References in these Regulations to a company's "articles" are to its articles of association.