49 CFR § 382.301 - Pre-employment testing.
(a) Prior to the first time a driver performs safety-sensitive functions for an employer, the driver shall undergo testing for controlled substances as a condition prior to being used, unless the employer uses the exception in paragraph (b) of this section. No employer shall allow a driver, who the employer intends to hire or use, to perform safety-sensitive functions unless the employer has received a controlled substances test result from the MRO or C/TPA indicating a verified negative test result for that driver.
(2) While participating in that program, either:
(i) Was tested for controlled substances within the past 6 months (from the date of application with the employer), or
(ii) Participated in the random controlled substances testing program for the previous 12 months (from the date of application with the employer); and
(3) The employer ensures that no prior employer of the driver of whom the employer has knowledge has records of a violation of this part or the controlled substances use rule of another DOT agency within the previous six months.
(1) An employer who exercises the exception in paragraph (b) of this section shall contact the controlled substances testing program(s) in which the driver participates or participated and shall obtain and retain from the testing program(s) the following information:
(i) Name(s) and address(es) of the program(s).
(ii) Verification that the driver participates or participated in the program(s).
(iii) Verification that the program(s) conforms to part 40 of this title.
(vi) The results of any tests taken within the previous six months and any other violations of subpart B of this part.
(2) An employer who uses, but does not employ a driver more than once a year to operate commercial motor vehicles must obtain the information in paragraph (c)(1) of this section at least once every six months. The records prepared under this paragraph shall be maintained in accordance with § 382.401. If the employer cannot verify that the driver is participating in a controlled substances testing program in accordance with this part and part 40 of this title, the employer shall conduct a pre-employment controlled substances test.
(d) An employer may, but is not required to, conduct pre-employment alcohol testing under this part. If an employer chooses to conduct pre-employment alcohol testing, it must comply with the following requirements:
(1) It must conduct a pre-employment alcohol test before the first performance of safety-sensitive functions by every covered employee (whether a new employee or someone who has transferred to a position involving the performance of safety-sensitive functions).
(2) It must treat all safety-sensitive employees performing safety-sensitive functions the same for the purpose of pre-employment alcohol testing (i.e., it must not test some covered employees and not others).