2013 - 1937
2014 - 427
If you are employed by a farmer you can operate under the farm exemption. However, if you are employed by a custom combiner you have to have a CDL. There is a restricted CDL that you can obtain based on custom combine work. While there are no knowledge or skills test for a restricted CDL, there are many other limitations. 49 CFR 383.3(f) outlines the limitations.