A New York driving instructor wants to teach at a second driving school in addition to their current school. What must they do?

1. Use the current MV-524 certificate because it automatically authorizes every school
2. Apply for an additional MV-524 certificate through the second school—no additional fee if a valid certificate exists elsewhere
3. Surrender the existing certificate before the second school can submit a new application
4. Teach at only one driving school because certification at multiple schools is prohibited