The number of CDL points that you may receive until your license is revoked can vary depending on the state where you live. For example, in the state of Missouri:
The specific rules may vary and the number of points may be different if you live in a different state, so this is merely a representative example. The key thing to notice, though, is that the more points that you get within a limited period of time, the greater your chances of having your license suspended. It is also important to note that even if your license is not suspended, your employer may have limits on the number of moving violations that you can receive before you are terminated.
If you receive a ticket as a commercial drivers license holder, it is within your best interests to consult with a lawyer to determine what options you may have, if any, for keeping the points off your license. Keeping the points off could be the difference between keeping your job and not, so never hesitate to get legal advice.