30. Extent of agent's authority.

The authority of an agent may be confined to a particular act or be general1 in its character. It will extend not only to acts expressly authorised but also to subordinate acts which are necessary or ordinarily incidental to the exercise of the express authority2 and to acts within the agent's ostensible authority3. In no case, however, can the authority of the agent exceed the power of the principal to act on his own behalf4. As between the agent and his principal, an agent's authority may be limited by agreement or special instructions, but, as regards third persons, the