Found out the hard way here in florida, got letter telling me that i had until june 25 to re-new my medical card, it had expired in january 2012 so on the 14th of june i re- newed the card, if i dint get a new card i would lose my cdl and i would then have a general license. Pulled over by D O T and they wanted to know why my license was suspended, took a while but i figured it out, i never went to the dmv to show them i had a new medical card. Told.my.story to the officers they understood(phew) and i went to the dmv the next day and paid $82.25 for my license and since i could not drive the truck it had to.be towed