The document which sets out the internal arrangement for the proper management of a company is the

The document which sets out the internal arrangement for the proper management of a company is the "Articles of Association". It is a legal document that outlines the rules, regulations, and procedures for the internal governance of a company. It defines the roles and responsibilities of the company's directors, the procedures for appointing and removing directors, the company's voting rights, and procedures for holding meetings. The articles of association are an important component of a company's constitution, and they are binding on both the company and its shareholders.