My D is a freshman who entered Notre Dame with 11 AP exams successfully completed. She worked through all the details but plans to double major in Political Science and Math with a minor in Constitutional Issues. Not sure if a math major from Arts & Letters is different than a math major in the business school. If it is a burning issue the Registrar’s office should be able to help but your son will need to know what he wants to major in because each department may have a different spin on how AP credits are accepted.