What action must a principal broker take when an existing license is no longer valid?

The appropriate action a principal broker must take when an existing license is no longer valid is to return the old license to the Commission. When a license is deemed invalid, it signifies a change in status that could involve various factors such as the expiration of the license, disciplinary action, or ineligibility.

Returning the old license is crucial because it helps maintain accurate records with the regulatory authority and ensures that the broker is not engaging in any activities under an invalid or unauthorized license. This action is part of the regulatory process that holds brokers accountable and upholds the integrity of the profession.

While notifying the Commission, submitting a request for renewal, or securing a new license can be important steps in different contexts, they do not address the immediate requirement of dealing with the invalidity of a current license. Each of those actions pertains to different aspects of license management and does not directly fulfill the obligation of returning the invalid license upon its invalidity.