Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

The latest general information on the Coronavirus Disease 2019 (COVID-19) is available on For USDOT specific COVID-19 resources, please visit our page.

DOT Rule 49 CFR Part 40 Section 40.235

Subpart K - Testing Sites, Forms, Equipment and Supplies Used in Alcohol Testing

§ 40.235 What are the requirements for proper use and care of ASDs?
(a) As an ASD manufacturer, you must submit, for NHTSA approval, a QAP for your ASD before NHTSA approves it and ODAPC places the device on its web page for “Approved Screening Devices to Measure Alcohol in Bodily Fluids”. Your QAP must specify the methods used for quality control checks, temperatures at which the ASD must be stored and used, the shelf life of the device, and environmental conditions (e.g., temperature, altitude, humidity) that may affect the ASD's performance.
(b) As a manufacturer, you must include with each ASD instructions for its use and care consistent with the QAP. The instructions must include directions on the proper use of the ASD, and, where applicable the time within which the device must be read, and the manner in which the reading is made.
(c) As the user of the ADS (e.g., employer, STT), you must follow the QAP instructions.
(d) You are not permitted to use an ASD that does not pass the specified quality control checks or that has passed its expiration date.
(e) As an employer, with respect to breath ASDs, you must also follow the device use and care requirements of §40.233.
[82 FR 52246, November 13, 2017]
Last updated: Monday, January 1, 2018