After _____ speeding conviction(s), a Junior Operator (i.e., younger than 18) who holds a learner's permit must retake the learner's permit exam.

After only one speeding conviction, a Junior Operator who holds a learner's permit must retake and pass the learner's permit examination. [Mandatory Permit Suspensions; License Suspension or Revocation; Chapter 2: Keeping Your License; Massachusetts RMV Driver's Manual]