"Second, the person’s body and mind are in better shape than would be expected based on the person’s chronological age (that is, the person is biologically youn

"Second, the person’s body and mind are in better shape than would be expected based on the person’s chronological age (that is, the person is biologically younger than he is chronologically)." There's a lot of subjectivity hidden here. As determined by a doctor? Which doctor? What criteria? If a 40 year old has debilitating congenital tremors, but has the "mind of a 30 year old", who gets to accept or reject their age change request? Their body might not be in "better shape than would be expected", but it's due to a lifelong condition, not age.