Final answer:
Eligibility for TRICARE Reserve Select (TRS) and TRICARE Retired Reserve (TRR) is lost when the sponsor retires from the military, reaches age 65, or passes away. A change in duty stations does not affect eligibility.
Step-by-step explanation:
TRICARE Reserve Select (TRS) and TRICARE Retired Reserve (TRR) are health care programs provided by the U.S. military. Members of TRS and TRR lose eligibility when the sponsor either retires from the military, reaches the age of 65, or dies. However, a change in duty stations does not affect their eligibility for these health care benefits. Once the sponsor reaches the age of 65, they are generally transitioned to Medicare, which is a government-funded health insurance program for seniors over the age of 65.