the O-5 level. Award of the MSM to USN, USMC, and USCG officers in pay grade O-4 (USN & USCG lieutenant commander / USMC major) and below, to include chief warrant officers and below (other than as an award at retirement to CWO5 and CWO4) is typically by exception and normally limited to those who have held one of the service's handful of O-4–level commanding officer assignments (e.g., Avenger-class mine countermeasures ship) or serving on a USN or USCG flag officer staff or USMC general officer staff. Enlisted award of the MSM in the Navy, Marine Corps, and Coast Guard is likewise typically limited to pay grades E-8 (e.g., USN/USCG senior chief petty officer and USMC master sergeant or first sergeant) and E-9 (e.g., USN/USCG master chief petty officer and USMC sergeant major or master gunnery sergeant), while award of the MSM to pay grade E-7 (e.g., USN/USCG chief petty officer and USMC gunnery sergeant) and below is very rare and by exception. In the Navy, Marine Corps, and Coast Guard, the awarding authority for the MSM must be either a flag officer or general officer holding the pay grade of O-7 or above. It is most common for Navy and Coast Guard master chief petty officers (typically command master chief petty officers) and Marine Corps master gunnery sergeants and sergeants major to receive the MSM as an end-of-tour award or upon retirement. Foreign military personnel in the ranks of NATO OF-5 (US O-6 equivalent) and below and individuals who have displayed a level of service that warrants an award of such magnitude may also be eligible to be awarded the MSM, subject to approval by a U.S. flag officer or general officer. To receive this medal, the individual must exhibit exceptionally meritorious service at that level of responsibility. Design and devices The Meritorious Service Medal is a bronze medal, 1.5 inches in diameter overall, consisting of six rays issuant from the upper three points of a five-pointed star with beveled edges and containing two smaller stars defined by incised outlines; in front of the lower part of the star an eagle with wings upraised standing upon two upward curving branches of laurel tied with a ribbon between the feet of the eagle. The reverse has the encircled inscriptions "UNITED STATES OF AMERICA" and "MERITORIOUS SERVICE". The suspension ribbon is 1 3/8 inches wide and consists of the following stripes: