MCO 1235.1A — Administration And Management Of The Individual Ready Reserve (irr)

MCO 1235.1A governs Marine Corps management and engagement of IRR Marines to maintain their availability for activation.

Search MCO 1235.1A

  • Publication number: MCO 1235.1A
  • Title: ADMINISTRATION AND MANAGEMENT OF THE INDIVIDUAL READY RESERVE (IRR)
  • Date: 21 Nov 2019
  • Proponent: 01000 Military Personnel
  • Status: Current

View MCO 1235.1A on armypubs.army.mil


It establishes policies and procedures for screening IRR Marines, assessing mobilization readiness, and supporting large-scale mobilization. It also covers Reserve Counterpart Training, including eligibility, medical screening, legal holds, and training requirements.

Topics covered

  • Individual Ready Reserve management
  • IRR screening program
  • Mobilization readiness levels
  • Reserve Counterpart Training
  • RCT eligibility
  • RCT medical screening
  • RCT legal holds

Questions and answers

What is the Marine Corps mission for managing IRR Marines?

On an enduring basis, the Marine Corps will conduct proactive management and engagement with Marines in the IRR in order to ensure their availability for activation throughout the full range of military operations. (paragraph 3)

How are IRR Marines screened?

Marines in the IRR will be continuously screened via phone contact, electronic contact, inperson musters and/or any other available and appropriate means. (paragraph 4)

Who is not eligible for Reserve Counterpart Training?

SMCR, IMA and members of the Standy Reserve are not eligible for RCT. (paragraph 3)

How long are RCT assignments normally?

RCT assignments will normally be two weeks in duration. (paragraph 3)

What medical requirement applies before RCT orders begin?

Prior to acceptance and initiation of RCT orders, Marines must be physically fit for duty. (paragraph 4)

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