There are two main types of shareholder agreements: it should be noted that, to be valid, one of the United States must be signed by all shareholders, whether or not their shares have voting rights. In addition to these signatory shareholders, the United States will be binding on all future shareholders, provided they are informed of their existence. A copy of the United States must be kept as part of the company`s documents and be available to any shareholder or creditor of the company for consultation. The possibility of withdrawing the powers of directors gives shareholders the right to assume some or all of the powers normally reserved for the board of directors. This has the advantage of allowing shareholders not only to exercise direct control over the affairs of the company, but also to commit in advance to how they will vote on decisions made under these new powers, which directors cannot do. However, it should be noted that the withdrawal of directors` powers is not without risk, because as soon as the United States comes into force, shareholders become responsible for the obligations and commitments of directors. Prior to the amendments, assignees of shares were considered parties to an existing United States as long as the agreement was recorded on the share certificates. Now, any person who acquires shares, whether as a purchaser or through a new issue of shares, is considered a party in effect at the time of the acquisition, whether or not they are aware of their existence. On the other hand, a unanimous shareholder agreement (“UNITED STATES”) is a written agreement between all shareholders (voting or not) of a company or all shareholders and one or more persons who are not shareholders, limiting all or part of the powers of the directors to manage or supervise the operations and affairs of the company (OBCA, § 108, paragraph 2). This allows shareholders to remove certain powers that directors have in managing or monitoring the affairs of the company. It should be noted that if the company has only one shareholder (who is the registered holder of all the shares issued by the company), that shareholder may make a written statement limiting all or part of the power of the directors to manage or supervise the management of the company`s operations and affairs (OBCA, see .