If you read the CDL licensing requirements book in PA it contradicts it's self. I asked PennDOT for a clarification on the statements and got, "read the book it is in there." According to the book you may have a trailer OVER 10,000 lbs. and as long as your combination wt. does not exceede 26,001 lbs. you are not required to have a CDL. I have asked State Police officers who I personally know and they all came back with the same answer. Drive it. It's all a money racquet for the state or small town cops who think they are the greatest DOT officers. I carry the book with me in my console and as soon as someone says something about it, that book is coming out and I have the page photocopied to give the the nice officer.