Which Army Regulation covers guidelines for NCOES?

The correct choice is based on the fact that Army Regulation 350-90 specifically outlines the guidelines and policies pertaining to the Noncommissioned Officer Education System (NCOES). This regulation provides the framework for the development, management, and execution of educational programs aimed at enhancing the skills and effectiveness of noncommissioned officers within the Army.

Understanding the significance of NCOES is crucial, as it emphasizes the Army's commitment to training and developing its leaders at various levels. The regulation not only details the requirements for attendance but also covers the processes for assessments and the overall structure of the educational courses available for NCOs.

Other regulations listed address different areas: AR 600-20 focuses on Army Command Policy, AR 700-142 deals with the logistical aspects of supply management, and AR 220-1 pertains to unit status reporting. While all are essential in their respective contexts, they do not specifically address the guidelines for the NCOES, thus clarifying why 350-90 is the most relevant regulation concerning this topic.