[Widget Jr]

Because he is former royalty, a foreign dignitary, and a Afghanistan combat veteran.

[Bruce Campbells Chin]

He's not a foreign dignitary, amd being a combat veteran doesn't entitled you to a salute unless you also are an active-duty officer. And he isn't.

And former royalty aren't entitled to jack squat either. Nor even are current royalty unless that current royalty includes a military commission.