In order to get your Commercial Learner's Permit (CLP) or Commercial Driver's License (CDL) in Texas, you'll first need to pass the Special Requirements Test. It's Texas-specific (other states don't have this requirement) and you'll need to pass it before you are allowed to proceed with other exams at the TX DMV. This test will need at least 70 to pass. The information on this test can be found on the DMV website. Try to do you best, this is not a very hard test.