Differentiating different sets in an or statement?

"Available to U.S. citizens or permanent residents of the United States that have been medically determined to have a permanent disability"

In the above statement (a cookie to those who can guess where that came from), if one were to read it
with no context — what would the correct interpretation?

1. It is available to the set of {U.S. Citizens} or the set of {permanent residents of the U.S. that have a disability}.

2. It is available to the set of {U.S. Citizens or Permanent residents of the U.S.} either of which have a permanent disability.

How would one go about "fixing" the statement to be more clear in either interpretations?