Knowledge requisite for valid ratification.— No valid ratification can be made by a person whose knowledge of the facts of the case is materially defective.

Effect of ratifying unauthorized act forming part of a transaction.— A person ratifying any unauthorized act done on his behalf ratifies the whole of the transaction of which such act formed a part.

Ratification of unauthorized act cannot injure third person.— An act done by one person on behalf of another, without such other person’s authority, which, if done with authority, would have the effect of subjecting a… 

Termination of agency.— An agency is terminated by the principal revoking his authority; or by the agent renouncing the business of the agency; or by the business of the agency being completed; or by either… 

Termination of agency, where agent has an interest in subject-matter.— Where the agent has himself an interest in the property which forms the subject-matter of the agency, the agency cannot, in the absence of an… 

When principal may revoke agent’s authority.— The principal may, save as is otherwise provided by the last preceding section, revoke the authority given to his agent at any time before the authority has been exercised… 

Revocation where authority has been partly exercised.— The principal cannot revoke the authority given to his agent after the authority has been partly exercised, so far as regards such acts and obligations as arise from… 

Compensation for revocation by principal, or renunciation by agent.— Where there is an express or implied contract that the agency should be continued for any period of time, the principal must make compensation to the… 

Notice of revocation or renunciation.— Reasonable notice must be given of such revocation or renunciation, otherwise the damage thereby resulting to the principal or the agent, as the case may be, must be made good…