You ask an excellent question . The reason is simple : many truck drivers drove trucks for years---just like these ladies did nails for years---and they were forced to get CDL's to keep their jobs---just like these ladies are going to have to pass a test to keep theirs.  A truck driver who used English as a second language wasn't given a break because they may have had trouble on a test.  They did what they needed to do , just as these ladies should.   For your addition info , my second comment was written using the truck driving requirements again after it appeared my first comment wasn't allowed to be shown by my fan club.  Thanks for asking.