This document discusses several key concepts related to corporate law, including ultra vires acts, constructive notice, and the doctrine of indoor management. It defines ultra vires as acts beyond a company's objects clause, and notes that ultra vires contracts are void from the beginning. The doctrine of constructive notice holds that those dealing with a company are deemed to have notice of its memorandum and articles of association, while the doctrine of indoor management protects outsiders as long as a contract is consistent with these public documents. The document also examines exceptions and consequences of ultra vires acts, and the binding effect of a company's memorandum and articles of association on members and outsiders.