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.
17. Power of Board to prescribe model articles(1) The Board may make rules prescribing model articles of association for companies.(2) Different model articles may be prescribed for different descriptions of company.(3) A company may adopt all or any of the provisions of model articles.(4) Any amendment of model articles by rules made under this section does not affect a company registered before the amendment takes effect.
"Amendment" here includes addition, alteration or repeal.
18. Default application of model articles(1) On the formation of a limited company—(a) if articles are not registered, or(b) if articles are registered, in so far as they do not exclude or modify the relevant model articles,the relevant model articles (so far as applicable) form part of the company's articles in the same manner and to the same extent as if articles in the form of those articles had been duly registered.(2) The "relevant model articles" means the model articles prescribed for a company of that description as in force at the date on which the company is registered.