fm 6-22
FM 6-22, Army Leadership
(CRM) process
FM (Field Manual) 21-20, Army Physical Fitness Training.
To my knowledge, there is no single AR or FM that specifically governs OMLs. They are addressed in several ARs for promotions and schools selections, as well as the Army Noncommissioned Officers Guide (FM 7-22.7).
leadershipAll the FM 22 series manualsfm 6-22FM
FM 23-65
608-1
Army Regulation 600-85
Army Regulation 530-1 and Army Regulation 25-1
The three levels of leadership are direct, organizational, and strategic. Reference AR 600-100 Army Leadership
AR 606-5
All the FM 22 series manuals