Section 188 in The Indian Contract Act, 1872
Title: Extent of agent's authority.
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.
(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.
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.
(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.
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.
Title: "Sub-agent" defined
A "sub-agent" is a person employed by, and acting under the control of, the original agent in the business of the agency.
Title: Representation of principal by sub-agent properly appointed.
Where a sub-agent is properly appointed, the principal is, so far as regards third persons, represented by the sub-agent, and is bound by and responsible for his acts, as if he were an agent originally appointed by the principal.
Agent's responsibility for sub-agent.—The agent is responsible to the principal for the acts of the sub-agent.
Sub-agent's responsibility.—The sub-agent is responsible for his acts to the agent, but not to the principal, except in cases of fraud or wilful wrong.