Most times it up to the disgression of the officer.Since my runin with the state police I have done everything necessary for PENDOT.Daully is plated class-8 combo(23600#) trailer is inspected twice a year,carry my medical card and have CDL licence.I even pull in the scales when there open,they just wave me through. On a footnote,last year while entering a toll plaza on Route 66 we were all pulled over and checked for licence,inspections,trailer hookups,tires,lights and brake-a-way switches.Many had to drop their trailers untill all saftey related repairs were made.There has been a hightened awareness and crack down on towing since there has been multipal deaths resulting from improper trailer hookups that came loose.