Which publication provides the reference for information on conduct and proficiency marks?

The publication that provides the reference for information on conduct and proficiency marks is MCO P1070.12. This manual outlines the policies and procedures related to the evaluation of Marines, including how conduct and proficiency marks are assigned. These marks are critical as they directly impact a Marine's performance report, promotion potential, and overall evaluation for duty assignments. Understanding this publication is essential for commanders and Marines alike, as it ensures that the marking process is fair, equitable, and in line with Marine Corps standards.

Other publications, while relevant to various aspects of Marine life and personnel management, do not specifically cover the conduct and proficiency markings in the same detail as MCO P1070.12, making it the definitive reference for these matters.