[T]here would be little sense [in deeming a corporation to be a legal person] unless there were also rules to tell one what acts are to count as the acts of the company. It is therefore a necessary part of corporate personality that there should be rules by which acts are attributed to the company. These may be called 'the rules of attribution'.
The company's primary rules of attribution will generally be found in its constitution, typically the articles of association, and will say things such as 'for the purpose of appointing members of the board, a majority vote of the shareholders shall be a decision of the company' or 'the decisions of the board in managing the company's business shall be the decisions of the company'. There are also primary rules of attribution which are not expressly stated in the articles but implied by company law, such as
the unanimous decision of all the shareholders in a solvent company about anything which the company under its memorandum of association has power to do shall be the decision of the company: see Multinational Gas and Petrochemical Co. v. Multinational Gas and Petrochemical Services Ltd.[212]
These primary rules of attribution are obviously not enough to enable a company to go out into the world and do business. Not every act on behalf of the company could be expected to be the subject of a resolution of the board or a unanimous decision of the shareholders. The company therefore builds upon the primary rules of attribution by using general rules of attribution which are equally available to natural persons, namely, the principles of agency. It will appoint servants and agents whose acts, by a combination of the general principles of agency and the company's primary rules of attribution, count as the acts of the company. And having done so, it will also make itself subject to the general rules by which liability for the acts of others can be attributed to natural persons, such as estoppel or ostensible authority in contract and vicarious liability in tort.
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The company's primary rules of attribution together with the general principles of agency, vicarious liability and so forth are usually sufficient to enable one to determine its rights and obligations. In exceptional cases, however, they will not provide an answer. This will be the case when a rule of law, either expressly or by implication, excludes attribution on the basis of the general principles of agency or vicarious liability. For example, a rule may be stated in language primarily applicable to a natural person and require some act or state of mind on the part of that person 'himself,' as opposed to his servants or agents. This is generally true of rules of the criminal law, which ordinarily impose liability only for the actus reus and mens rea of the defendant himself. How is such a rule to be applied to a company?
One possibility is that the court may come to the conclusion that the rule was not intended to apply to companies at all; for example, a law which created an offence for which the only penalty was community service. Another possibility is that the court might interpret the law as meaning that it could apply to a company only on the basis of its primary rules of attribution, i.e. if the act giving rise to liability was specifically authorised by a resolution of the board or an unanimous agreement of the shareholders. But there will be many cases in which neither of these solutions is satisfactory; in which the court considers that the law was intended to apply to companies and that, although it excludes ordinary vicarious liability, insistence on the primary rules of attribution would in practice defeat that intention. In such a case, the court must fashion a special rule of attribution for the particular substantive rule. This is always a matter of interpretation: given that it was intended to apply to a company, how was it intended to apply? Whose act (or knowledge, or state of mind) was for this purpose intended to count as the act etc. of the company? One finds the answer to this question by applying the usual canons of interpretation, taking into account the language of the rule (if it is a statute) and its content and policy.[213]