(1.) A power of attorney is a written authorization executed by one person, called the principal, directing another person, called the attorney in fact, to perform some act or acts for the principal. A power of attorney is deemed to be in effect until revoked or until the death of the principal.

(2.) The power of attorney to execute a deed, mortgage or other instrument affecting real property, must be in writing and be subscribed, acknowledged or approved, and certified and recorded, in like manner as grants of property.

(3.) In California, a married woman may make, execute and revoke powers of attorney for the sale, conveyance or incumbrance of her real or personal estate with the same affect as if she were unmarried.

(4.) A power of attorney may be revoked at the pleasure of the principal, unless the attorney in fact, or some third person, has an interest in the subject matter of the power.

(5.) A power of attorney which has been recorded and which affects real estate is not revoked by any act of the party by whom it was executed, unless the instrument containing such revocation is acknowledged and certified and recorded in the same office in which the instrument containing the power was recorded.

(6.) An attorney in fact, in executing an instrument transferring any estate in real property, must subscribe the name of his principal to it and his own name as attorney in fact. The name of the principal is recited in the body of the instrument and the signature is made thus: "John Jones, by his attorney in fact, Peter Brown."