(1) A principal may designate two or more persons to act as co-agents. If two or more persons are appointed as co-agents, and unless the power of attorney otherwise provides, the concurrence of a majority is required on all acts connected with the power of attorney. This restriction does not apply when any co-agent receives and receipts for property due the principal, when the concurrence of a majority cannot readily be obtained in the time reasonably available for emergency action necessary to act in the principal’s best interest, or when a co-agent has been delegated to act for others as provided in §