Final answer:
The OPM and individual federal agencies have the authority to make medical determinations for preference eligible veterans, in accordance with OPM guidelines.
Step-by-step explanation:
The question pertains to the authority to make medical determinations for preference eligible veterans within the United States, specifically in regards to potential disqualification for federal employment under a disability preference. According to the U.S. Office of Personnel Management (OPM) and other relevant laws, such as the Veterans' Preference Act, the OPM and federal employing agencies collaborate in determining eligibility for veterans' preference in federal hiring.
The OPM provides overarching policy guidance and the individual agency has the authority to make case-specific determinations, including medical qualifications or disqualifications. However, these determinations must adhere to policies and regulations set forth by the OPM. In cases of medical disqualification, the veteran can seek the assistance of the Department of Veterans Affairs to provide services and support.