189. Agency terminated by death or mental illness of principal.

Except as already stated with regard to irrevocable authorities1, the authority of an agent is terminated by the principal's death2, or by the principal becoming incapable by reason of mental illness of managing his affairs3. The representatives of a deceased principal may, however, ratify a contract made by the agent subsequent to his principal's death if they think fit, though, in the absence of a ratification, they are not bound by it