Section 186 in The Indian Contract Act, 1872

Title: Agent's authority may be expressed or implied.

Description: The authority of an agent may be expressed or implied1. 1. See, however, the Registration Act, 1908 (16 of 1908), s. 33; see also the Code of Civil Procedure, 1908 (5 of 1908), Sch. I, Order III, rule 4.

Title: Definitions of express and implied authority.

Description: An authority is said to be express when it is given by words spoken or written. An authority is said to be implied when it is to be inferred from the circumstances of the case; and things spoken or written, or the ordinary course of dealing, may be accounted circumstances of the case. Illustration A owns a shop in Serampore, living himself in Calcutta, and visiting the shop occasionally. The shop is managed by B, and he is in the habit of ordering goods from C in the name of A for the purposes of the shop, and of paying for them out of A's funds with A's knowledge. B has an implied authority from A to order goods from C in the name of A for the purposes of the shop

Title: Extent of agent's authority.

Description: An agent, having an authority to do an act, has authority to do every lawful thing which is necessary in order to do such act. An agent having an authority to carry on a business, has authority to do every lawful thing necessary for the purpose, or usually done in the course, of conducting such business. Illustrations (a) A is employed by B, residing in London, to recover at Bombay a debt due to B. A may adopt any legal process necessary for the purpose of recovering the debt, and may give a valid discharge for the same. (b) A constitutes B his agent to carry on his business of a shipbuilder. B may purchase timber and other materials, and hire workmen, for the purpose of carrying on the business

Title: Agent's authority in an emergency.

Description: An agent has authority, in an emergency, to do all such acts for the purpose of protecting his principal from loss as would be done by a person of ordinary prudence, in his own case, under similar circumstances. Illustrations (a) An agent for sale may have goods repaired if it be necessary. (b) A consigns provisions to B at Calcutta, with directions to send them immediately to C, at Cuttack. B may sell the provisions at Calcutta, if they will not bear the journey to Cuttack without spoiling

Title: When agent cannot delegate.

Description: An agent cannot lawfully employ another to perform acts which he has expressly or impliedly undertaken to perform personally, unless by the ordinary custom of trade a sub-agent may, or, from the nature of the agency, a sub-agent must, be employed.