What is the meaning of training and readiness oversight?

(DoD) The authority that combatant commanders may exercise over assigned Reserve Component forces when not on active duty or when on active duty for training. As a matter of Department of Defense policy, this authority includes: a. Providing guidance to Service component commanders on operational requirements and priorities to be addressed in Military Department training and readiness programs; b. Commenting on Service component program recommendations and budget requests; c. Coordinating and approving participation by assigned Reserve Component forces in joint exercises and other joint training when on active duty for training or performing inactive duty for training; d. Obtaining and reviewing readiness and inspection reports on assigned Reserve Component forces; and e. Coordinating and reviewing mobilization plans (including post-mobilization training activities and deployability validation procedures) developed for assigned Reserve Component forces. Also called TRO. See also combatant commander.