MCO 3400.12 — Chemical, Biological, Radiological And Nuclear Defense (cbrnd) Program

MCO 3400.12 governs the Marine Corps Chemical, Biological, Radiological, and Nuclear Defense (CBRND) Program.

Search MCO 3400.12

  • Publication number: MCO 3400.12
  • Title: CHEMICAL, BIOLOGICAL, RADIOLOGICAL AND NUCLEAR DEFENSE (CBRND) PROGRAM
  • Date: 7 Feb 2025
  • Proponent: 03000 Operations & Readiness
  • Status: New

View MCO 3400.12 on armypubs.army.mil

MCO 3400.12 establishes the CBRND Program and addresses personnel, operations, training, safety, logistics, and publications. It sets qualification criteria, assignment conditions, and requirements for unit CBRN defense and response training.

Applies to: This Order is applicable to the Marine Corps Total Force.

Topics covered

  • CBRND qualification criteria
  • CBRND personnel assignments
  • CBRND School training
  • Unit CBRN defense training
  • CBRN response training
  • CBRN response capabilities

Questions and answers

Who can be assigned to 57XX billets?

Due to the technical and perishable nature of the CBRND skill set, only formally trained CBRND personnel with the requisite MOS shall be assigned to 57XX billets. (paragraph 3)

How long must CBRND officers-in-charge ensure this training lasts?

CBRND officers-in-charge will ensure this training (not less than a 30-day period) is accomplished to familiarize the Marine with current requirements and standard operating procedures. (paragraph 3)

Which school is authorized to qualify Marine Corps CBRND subject matter experts?

The CBRND School is the only school authorized to teach and qualify personnel in the Marine Corps as CBRND and response subject matter experts. (paragraph 4)

What training programs must commanders implement for CBRN defense units?

Commanders shall implement comprehensive CBRN defense training programs, ensuring skills for both individual and collective training are satisfied per references (l) through (o).

What must commanders ensure about unit missions under CBRN conditions?

Commanders must ensure their units are capable of executing their missions under CBRN conditions per reference (m).

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