MCO 5216.9Y — Headquarters U.s. Marine Corps Organization And Organization Codes

MCO 5216.9Y governs Headquarters Marine Corps organization and the use of organizational codes on communications.

Search MCO 5216.9Y

  • Publication number: MCO 5216.9Y
  • Title: HEADQUARTERS U.S. MARINE CORPS ORGANIZATION AND ORGANIZATION CODES
  • Date: 29 Jul 2015
  • Proponent: 05000 General Admin & Management
  • Status: Current

View MCO 5216.9Y on armypubs.army.mil

It identifies HQMC staff agencies and their abbreviated communication codes. It requires codes and symbols on specified mail and naval messages and explains how coded correspondence is routed.

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

Topics covered

  • HQMC organization
  • Organizational codes
  • Naval message addressing
  • Outgoing correspondence
  • Mail routing
  • HQMC organizational directory

Questions and answers

Where must HQMC organizational codes appear on mail to and from the CMC?

HQMC organizational codes are to be placed on mail (correspondence, route sheets, and envelopes) from and to the CMC. These codes identify the HQMC originator and/or the intended HQMC recipient. (paragraph 4)

Are organization codes and symbols required on Marine Corps naval messages?

Organization codes and symbols, when known, are required for each addressee (except commercial addressees) on all naval messages originated by the Marine Corps. (paragraph 4)

Where are organization codes and symbols placed on naval messages?

Place organization codes and symbols in the "From," "To," and/or "Info" lines on messages immediately following the Plain Language Address (PLA). (paragraph 4)

What phrase must appear on envelopes containing consolidated correspondence to the CMC?

Place the phrase "CONTAINS CONSOLIDATED CORRESPONDENCE" on the lower left quadrant of the outside envelope when mailing the consolidated correspondence to the CMC. (paragraph 4)

What must a proper address include for mail inside consolidated correspondence?

Properly address each piece of mail inside the envelope; a proper address includes the correct HQMC organizational code in parentheses. (paragraph 4)

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