Section 13.33.205 - Designation of agent and termination of authority(a) By writing signed by all parties, the parties may designate as agent of all parties on an account a person other than a party.(b) Unless the terms of an agency designation provide that the authority of the agent terminates on disability or incapacity of a party, the agent's authority survives disability and incapacity. The agent may act for a disabled or incapacitated party until the authority of the agent is terminated.(c) Death of the sole party or last surviving party terminates the authority of an agent.