The MGIB is available for those who enlist in the U.S. Armed Forces. It includes both the Montgomery GI Bill-Active Duty (Chapter 30) and The Montgomery GI Bill-Selected Reserve (Chapter 1606).
Under Chapter 30, Active Duty members enroll and pay $100 per month for 12 months. They are then entitled to receive a monthly education benefit once they have completed a minimum service obligation. Under Chapter 1606, a reservist must be actively drilling and have a 6-year obligation in the Selected Reserve to be eligible.