What Disqualifies You From Getting A CDL In PA?

What Disqualifies You From Getting A CDL In PA? How does a Commercial Driver become disqualified? A disqualification can result from a single conviction for a MAJOR OFFENSE, an accumulation of SERIOUS TRAFFIC OFFENSES or for other specific violations, i.e. violations of railroad-highway grade crossings. What disqualifies you from getting a CDL in Pennsylvania? A