DOT Rule 49 CFR Part 40 Section 40.85

(a) As a laboratory, you must use the cutoff concentrations displayed in the following table for initial and confirmatory drug tests. All cutoff concentrations are expressed in...

DOT Rule 49 CFR Part 40 Section 40.83 Q&A

§40.83                                                ...

DOT Rule 49 CFR Part 40 Section 40.83

As the laboratory, you must do the following when you receive a DOT specimen:

(a) You are authorized to receive only Copy 1 of the CCF. You are not authorized to receive other copies of...

DOT Rule 49 CFR Part 40 Section 40.81

(a) As a drug testing laboratory located in the U.S., you are permitted to participate in DOT drug testing only if you are certified by HHS under the National Laboratory Certification Program...

DOT Rule 49 CFR Part 40 Section 40.73 Q&A

§40.73; §40.193                                              ...

DOT Rule 49 CFR Part 40 Section 40.73

(a) The collector must be present and maintain visual contact with the employee during the procedures outlined in this section. 

DOT Rule 49 CFR Part 40 Section 40.71

(a) All collections under DOT agency drug testing regulations must be split specimen collections. 

(b) As the collector, you must take the following steps, in order, after the...

DOT Rule 49 CFR Part 40 Section 40.69 Q&A

§40.67; §40.69                                              ...

DOT Rule 49 CFR Part 40 Section 40.69

(a) As stated in § 40.42(f)(2), if you are conducting a urine collection in a multi-stall restroom and you cannot secure all sources of water and other substances that could be used for adulteration and...

DOT Rule 49 CFR Part 40 Section 40.67, 40.69 Q&A

§40.67; §40.69                                              ...