46 CFR 16.113: Chemical drug testing procedures and substances

Last reviewed: October 14, 2026

This section says drug testing programs required by this part must follow 49 CFR part 40. They must use only laboratories certified by the Department of Health and Human Services (DHHS). Each specimen is tested for marijuana, cocaine, opiates, phencyclidine (PCP), and amphetamines.

Applies toDrug testing programs required by this part, and the credentialed mariners, marine employers, MRO, SAP and other chemical testing service providers involved in them.

What it says

  1. Drug testing programs required by this part must be conducted in accordance with 49 CFR part 40, Procedures for Transportation Workplace Testing Programs.

    46 CFR 16.113(a)“Drug testing programs required by this part must be conducted in accordance with 49 CFR part 40, Procedures for Transportation Workplace Testing Programs.”

  2. This subpart summarizes the responsibilities of credentialed mariners, marine employers, MRO, SAP and other chemical testing service providers in 49 CFR part 40.

    46 CFR 16.113(a)“This subpart summarizes the responsibilities of credentialed mariners, marine employers, MRO, SAP and other chemical testing service providers in 49 CFR part 40.”

  3. The regulations in 49 CFR part 40 should be consulted to determine the specific procedures that must be established and used.

    46 CFR 16.113(a)“The regulations in 49 CFR part 40 should be consulted to determine the specific procedures which must be established and utilized.”

  4. Drug testing programs required by this part must use only drug testing laboratories certified by the Department of Health and Human Services (DHHS).

    46 CFR 16.113(a)“Drug testing programs required by this part must use only drug testing laboratories certified by the Department of Health and Human Services (DHHS).”

  5. Each specimen collected in accordance with this part will be tested, as provided in 49 CFR 40.85, for marijuana, cocaine, opiates, phencyclidine (PCP), and amphetamines.

    46 CFR 16.113(b)“Each specimen collected in accordance with this part will be tested, as provided in 49 CFR 40.85, for the following:”

Common questions

What rules govern drug testing programs under 46 CFR 16.113?

Drug testing programs required by this part must be conducted in accordance with 49 CFR part 40.

“Drug testing programs required by this part must be conducted in accordance with 49 CFR part 40, Procedures for Transportation Workplace Testing Programs.”

Which laboratories can be used for mariner drug tests?

Programs required by this part must use only drug testing laboratories certified by the Department of Health and Human Services (DHHS).

“Drug testing programs required by this part must use only drug testing laboratories certified by the Department of Health and Human Services (DHHS).”

What drugs is each specimen tested for?

Each specimen is tested for marijuana, cocaine, opiates, phencyclidine (PCP), and amphetamines, as provided in 49 CFR 40.85.

“Each specimen collected in accordance with this part will be tested, as provided in 49 CFR 40.85, for the following:”

The text of 46 CFR 16.113

Electronic Code of Federal Regulations (eCFR), current as of April 16, 2026 · Read it on eCFR

Chemical drug testing

(a) Drug testing programs required by this part must be conducted in accordance with 49 CFR part 40, Procedures for Transportation Workplace Testing Programs. This subpart summarizes the responsibilities of credentialed mariners, marine employers, MRO, SAP and other chemical testing service providers in 49 CFR part 40. The regulations in 49 CFR part 40 should be consulted to determine the specific procedures which must be established and utilized. Drug testing programs required by this part must use only drug testing laboratories certified by the Department of Health and Human Services (DHHS).

(b) Each specimen collected in accordance with this part will be tested, as provided in 49 CFR 40.85, for the following:

(1) Marijuana;

(2) Cocaine;

(3) Opiates;

(4) Phencyclidine (PCP); and

(5) Amphetamines.

Sections it refers to

The plain-English explanation on this page was written with AI from the regulation text above and checked automatically before publishing: every quote appears in the text, every number comes from it, and a second model confirmed each statement adds nothing the text doesn't say. Regulation text current as of April 16, 2026. The regulation text governs. RegKnot is not affiliated with the U.S. Coast Guard.