The SA's report the academy/military contribution to the IRS.
According to Navy JAG from Naval District Washington Legal Office who created slides and briefed to midshipmen over the years, living with parents is the proof of support, not a dollar amount. Their interpretation of the 50% is living with your parent(s) for 6 months. USNA doesn’t provide a letter stating a dollar amount like USMA does that I have seen on SAF.
I tend to support Zeus on this one ....I am not a tax attorney, but understand the system (as well as anyone can), and have kids myself. The burden is on the Parent who wants to claim a kid as an exemption to prove support, not upon the Service Academy to prove that they support the kid. I don't see where the cost of service academy support is relevant to the IRS. Of course, the Service Academy does report pay and benefits and provides the Midshipman a W-2, but that's a different issue.
Bottom line, parent will have a hard time claiming a Midshipman as a dependant after I-day.