The Department of Defense is finalizing a rule implementing section 711 of the National Defense Authorization Act for Fiscal Year 2017 (NDAA-17) (Pub. L. 114328) to continue TRICARE program coverage for certain members of the National Guard and their dependents during certain disaster response duty. It applies discretionary authority broadened by 748(b) of NDAA-17 to expand the TRICARE Reserve and Guard Family Benefits program to all families of Reserve Component (RC) members on active duty for more than 30 days, except for the families of RC members performing active Guard and Reserve (AGR) duty for a period of 180 consecutive days or more. It also implements section 511 of NDAA-18 (Pub. L. 115-91) to expand both early eligibility TRICARE coverage and Transitional Assistance Management Program (TAMP) coverage to RC members on active duty for preplanned missions under 10 U.S.C. 12304b.