The Commercial Driver's License Drug and Alcohol Clearinghouse is new, and will require reporting. Currently it's only part of your employer record, although you are supposed to report instances of being place out or service for this to your state licensing authority. The clearinghouse makes it part of a searchable record, accessible (and required) by potential employers. Compliance Date: January 6, 2020
"Employers will be required to query the Clearinghouse and request drug and alcohol testing histories from previous employers until the Clearinghouse has been in operation for at least 3 years. After 3 years, employers subject to part 382 will no longer be required to request drug and alcohol testing histories from previous employers, except in the following situations. When an employer relies on the § 382.301(b) exception to the pre-employment testing requirement, the employer must meet all of the requirements, including verifying that the driver participated in the controlled substances testing specified in § 382.301(b)(2)(i) and (ii) and had no recorded violations of another DOT agency's controlled substances use rule within the previous 6 months."
Map-21 was signed into law by B.H.O.
The part that is new for Jan 2018 is the requirement for testing for four semi-synthetic opioids.