CDL B theory is a course that covers the knowledge and skills required to drive a Class B commercial vehicle. It is part of the Entry-Level Driver Training (ELDT) requirements for obtaining a Class B commercial driver’s license (CDL). This course covers 29 units for the CDL Class B ELDT as mandated by the FMCSA. Upon completion of this course the results will be submitted to the FMCSA Training Provider Registry. Prior to providing any testing services CDL Testing centers will retrieve these results from the FMCSA Training Provider Registry to confirm that the student has completed this course.