That law is a requirement of the company.
Keep it real.
Yes, you are correct. Nothing in there about law enforcement testing of any kind.
I had known, but subsequently forgotten, that a CDL driver had to be tested after a fatal accident. I couldn't remember the specifics, so I've since looked it up. I have also placed links to the law in a prior post.
There is no requirement for the cops to perform the test, only the company. It is also time-limited, in that it specifies all attempts to obtain a sample must cease after 2 hours for alcohol testing, and 32 hours for controlled substance testing, and if no sample/testing occurred, a report needed to be filed by the employer to the applicable federal agency.